Hier meine Exim4 Konfiguration auf Debian Lenny (5.0) mit folgenden Merkmalen :
-Der Server nutzt Veschlüsselung
- Der Server verlangt SMTP Auth für Versand ( Passwörter von PAM bezogen)
- Der Server legt Mails im Maildirformat ab ( Nutzung mit Courier IMAP)
- Je nach Absender werden die Mails über verschiedene Mailserver versendet.

Folgende Pakete werden benötigt:
exim4
libsasl2-modules
sasl2-bin

Exim muss in der sasl Gruppe sein:
Dazu folgender Befehl:

adduser debian-exim sasl

Datei /etc/exim4/exim4.conf

######################################################################
#                  Runtime configuration file for Exim               #
######################################################################

# This is a default configuration file which will operate correctly in
# uncomplicated installations. Please see the manual for a complete list
# of all the runtime configuration options that can be included in a
# configuration file. There are many more than are mentioned here. The
# manual is in the file doc/spec.txt in the Exim distribution as a plain
# ASCII file. Other formats (PostScript, Texinfo, HTML, PDF) are available
# from the Exim ftp sites. The manual is also online at the Exim web sites.

# This file is divided into several parts, all but the first of which are
# headed by a line starting with the word "begin". Only those parts that
# are required need to be present. Blank lines, and lines starting with #
# are ignored.

########### IMPORTANT ########## IMPORTANT ########### IMPORTANT ###########
#                                                                          #
# Whenever you change Exim's configuration file, you *must* remember to    #
# HUP the Exim daemon, because it will not pick up the new configuration   #
# until you do. However, any other Exim processes that are started, for    #
# example, a process started by an MUA in order to send a message, will    #
# see the new configuration as soon as it is in place.                     #
#                                                                          #
# You do not need to HUP the daemon for changes in auxiliary files that    #
# are referenced from this file. They are read every time they are used.   #
#                                                                          #
# It is usually a good idea to test a new configuration for syntactic      #
# correctness before installing it (for example, by running the command    #
# "exim -C /config/file.new -bV").                                         #
#                                                                          #
########### IMPORTANT ########## IMPORTANT ########### IMPORTANT ###########

######################################################################
#                    MAIN CONFIGURATION SETTINGS                     #
######################################################################

# Specify your host's canonical name here. This should normally be the fully
# qualified "official" name of your host. If this option is not set, the
# uname() function is called to obtain the name. In many cases this does
# the right thing and you need not set anything explicitly.

# primary_hostname =
local_interfaces = 0.0.0.0.25

# The next three settings create two lists of domains and one list of hosts.
# These lists are referred to later in this configuration using the syntax
# +local_domains, +relay_to_domains, and +relay_from_hosts, respectively. They
# are all colon-separated lists:

domainlist local_domains = localhost : meinhost.name

domainlist relay_to_domains =
hostlist   relay_from_hosts = 127.0.0.1

# Most straightforward access control requirements can be obtained by
# appropriate settings of the above options. In more complicated situations, you
# may need to modify the Access Control List (ACL) which appears later in this
# file.

# The first setting specifies your local domains, for example:
#
#   domainlist local_domains = my.first.domain : my.second.domain
#
# You can use "@" to mean "the name of the local host", as in the default
# setting above. This is the name that is specified by primary_hostname,
# as specified above (or defaulted). If you do not want to do any local
# deliveries, remove the "@" from the setting above. If you want to accept mail
# addressed to your host's literal IP address, for example, mail addressed to
# "user@[192.168.23.44]", you can add "@[]" as an item in the local domains
# list. You also need to uncomment "allow_domain_literals" below. This is not
# recommended for today's Internet.

# The second setting specifies domains for which your host is an incoming relay.
# If you are not doing any relaying, you should leave the list empty. However,
# if your host is an MX backup or gateway of some kind for some domains, you
# must set relay_to_domains to match those domains. For example:
#
# domainlist relay_to_domains = *.myco.com : my.friend.org
#
# This will allow any host to relay through your host to those domains.
# See the section of the manual entitled "Control of relaying" for more
# information.

# The third setting specifies hosts that can use your host as an outgoing relay
# to any other host on the Internet. Such a setting commonly refers to a
# complete local network as well as the localhost. For example:
#
# hostlist relay_from_hosts = 127.0.0.1 : 192.168.0.0/16
#
# The "/16" is a bit mask (CIDR notation), not a number of hosts. Note that you
# have to include 127.0.0.1 if you want to allow processes on your host to send
# SMTP mail by using the loopback address. A number of MUAs use this method of
# sending mail.

# All three of these lists may contain many different kinds of item, including
# wildcarded names, regular expressions, and file lookups. See the reference
# manual for details. The lists above are used in the access control list for
# incoming messages. The name of this ACL is defined here:

acl_smtp_rcpt = acl_check_rcpt

# You should not change that setting until you understand how ACLs work.

# Specify the domain you want to be added to all unqualified addresses
# here. An unqualified address is one that does not contain an "@" character
# followed by a domain. For example, "caesar@rome.example" is a fully qualified
# address, but the string "caesar" (i.e. just a login name) is an unqualified
# email address. Unqualified addresses are accepted only from local callers by
# default. See the recipient_unqualified_hosts option if you want to permit
# unqualified addresses from remote sources. If this option is not set, the
# primary_hostname value is used for qualification.

# qualify_domain =

# If you want unqualified recipient addresses to be qualified with a different
# domain to unqualified sender addresses, specify the recipient domain here.
# If this option is not set, the qualify_domain value is used.

# qualify_recipient =

# The following line must be uncommented if you want Exim to recognize
# addresses of the form "user@[10.11.12.13]" that is, with a "domain literal"
# (an IP address) instead of a named domain. The RFCs still require this form,
# but it makes little sense to permit mail to be sent to specific hosts by
# their IP address in the modern Internet. This ancient format has been used
# by those seeking to abuse hosts by using them for unwanted relaying. If you
# really do want to support domain literals, uncomment the following line, and
# see also the "domain_literal" router below.

# allow_domain_literals

# No deliveries will ever be run under the uids of these users (a colon-
# separated list). An attempt to do so causes a panic error to be logged, and
# the delivery to be deferred. This is a paranoic safety catch. There is an
# even stronger safety catch in the form of the FIXED_NEVER_USERS setting
# in the configuration for building Exim. The list of users that it specifies
# is built into the binary, and cannot be changed. The option below just adds
# additional users to the list. The default for FIXED_NEVER_USERS is "root",
# but just to be absolutely sure, the default here is also "root".

# Note that the default setting means you cannot deliver mail addressed to root
# as if it were a normal user. This isn't usually a problem, as most sites have
# an alias for root that redirects such mail to a human administrator.

never_users = root

# The setting below causes Exim to do a reverse DNS lookup on all incoming
# IP calls, in order to get the true host name. If you feel this is too
# expensive, you can specify the networks for which a lookup is done, or
# remove the setting entirely.

host_lookup = *

# The settings below, which are actually the same as the defaults in the
# code, cause Exim to make RFC 1413 (ident) callbacks for all incoming SMTP
# calls. You can limit the hosts to which these calls are made, and/or change
# the timeout that is used. If you set the timeout to zero, all RFC 1413 calls
# are disabled. RFC 1413 calls are cheap and can provide useful information
# for tracing problem messages, but some hosts and firewalls have problems
# with them. This can result in a timeout instead of an immediate refused
# connection, leading to delays on starting up an SMTP session.

rfc1413_hosts = *
rfc1413_query_timeout = 30s

# By default, Exim expects all envelope addresses to be fully qualified, that
# is, they must contain both a local part and a domain. If you want to accept
# unqualified addresses (just a local part) from certain hosts, you can specify
# these hosts by setting one or both of
#
# sender_unqualified_hosts =
# recipient_unqualified_hosts =
#
# to control sender and recipient addresses, respectively. When this is done,
# unqualified addresses are qualified using the settings of qualify_domain
# and/or qualify_recipient (see above).

# If you want Exim to support the "percent hack" for certain domains,
# uncomment the following line and provide a list of domains. The "percent
# hack" is the feature by which mail addressed to x%y@z (where z is one of
# the domains listed) is locally rerouted to x@y and sent on. If z is not one
# of the "percent hack" domains, x%y is treated as an ordinary local part. This
# hack is rarely needed nowadays; you should not enable it unless you are sure
# that you really need it.
#
# percent_hack_domains =
#
# As well as setting this option you will also need to remove the test
# for local parts containing % in the ACL definition below.

# When Exim can neither deliver a message nor return it to sender, it "freezes"
# the delivery error message (aka "bounce message"). There are also other
# circumstances in which messages get frozen. They will stay on the queue for
# ever unless one of the following options is set.

# This option unfreezes frozen bounce messages after two days, tries
# once more to deliver them, and ignores any delivery failures.

ignore_bounce_errors_after = 2d

# This option cancels (removes) frozen messages that are older than a week.

timeout_frozen_after = 7d

#system_filter = /etc/exim4/exim_system_filter.conf
#system_filter_user = Debian-exim

smtp_accept_max_per_connection = 150
smtp_accept_queue_per_connection = 150
############tls
tls_certificate = /etc/ssl/certs/ssl-cert-snakeoil.pem
tls_privatekey = /etc/ssl/private/ssl-cert-snakeoil.key
#tls_verify_certificates = /etc/ssl/certs
tls_advertise_hosts = *
#tls_try_verify_hosts = *
log_selector = +tls_peerdn
received_header_text = "Received: \
    ${if def:sender_rcvhost {from ${sender_rcvhost}\n\t}\
    {${if def:sender_ident {from ${sender_ident} }}\
    ${if def:sender_helo_name {(helo=${sender_helo_name})\n\t}}}}\
    by ${primary_hostname} \
    ${if def:received_protocol {with ${received_protocol}}} \
    ${if def:tls_cipher {($tls_cipher)\n\t}}\
    ${if def:tls_peerdn {($tls_peerdn)(verified=$tls_certificate_verified)\n\t}} \
    (Exim ${version_number} #${compile_number})\n\t\
    id ${message_id}\
    ${if def:received_for {\n\tfor $received_for}}"

######################################################################
#                       ACL CONFIGURATION                            #
#         Specifies access control lists for incoming SMTP mail      #
######################################################################

begin acl

# This access control list is used for every RCPT command in an incoming
# SMTP message. The tests are run in order until the address is either
# accepted or denied.

acl_check_rcpt:

  # Accept if the source is local SMTP (i.e. not over TCP/IP). We do this by
  # testing for an empty sending host field.

  accept  hosts = :

  #############################################################################
  # The following section of the ACL is concerned with local parts that contain
  # @ or % or ! or / or | or dots in unusual places.
  #
  # The characters other than dots are rarely found in genuine local parts, but
  # are often tried by people looking to circumvent relaying restrictions.
  # Therefore, although they are valid in local parts, these rules lock them
  # out, as a precaution.
  #
  # Empty components (two dots in a row) are not valid in RFC 2822, but Exim
  # allows them because they have been encountered. (Consider local parts
  # constructed as "firstinitial.secondinitial.familyname" when applied to
  # someone like me, who has no second initial.) However, a local part starting
  # with a dot or containing /../ can cause trouble if it is used as part of a
  # file name (e.g. for a mailing list). This is also true for local parts that
  # contain slashes. A pipe symbol can also be troublesome if the local part is
  # incorporated unthinkingly into a shell command line.
  #
  # Two different rules are used. The first one is stricter, and is applied to
  # messages that are addressed to one of the local domains handled by this
  # host. It blocks local parts that begin with a dot or contain @ % ! / or |.
  # If you have local accounts that include these characters, you will have to
  # modify this rule.

  deny    message       = Restricted characters in address
          domains       = +local_domains
          local_parts   = ^[.] : ^.*[@%!/|]

  # The second rule applies to all other domains, and is less strict. This
  # allows your own users to send outgoing messages to sites that use slashes
  # and vertical bars in their local parts. It blocks local parts that begin
  # with a dot, slash, or vertical bar, but allows these characters within the
  # local part. However, the sequence /../ is barred. The use of @ % and ! is
  # blocked, as before. The motivation here is to prevent your users (or
  # your users' viruses) from mounting certain kinds of attack on remote sites.

  deny    message       = Restricted characters in address
          domains       = !+local_domains
          local_parts   = ^[./|] : ^.*[@%!] : ^.*/\\.\\./
  #############################################################################

  # Accept mail to postmaster in any local domain, regardless of the source,
  # and without verifying the sender.

  accept  local_parts   = postmaster
          domains       = +local_domains

  # Deny unless the sender address can be verified.

  require verify        = sender

  #############################################################################
  # There are no checks on DNS "black" lists because the domains that contain
  # these lists are changing all the time. However, here are two examples of
  # how you could get Exim to perform a DNS black list lookup at this point.
  # The first one denies, while the second just warns.
  #
  # deny    message       = rejected because $sender_host_address is in a black list at $dnslist_domain\n$dnslist_text
  #         dnslists      = black.list.example
  #
  # warn    message       = X-Warning: $sender_host_address is in a black list at $dnslist_domain
  #         log_message   = found in $dnslist_domain
  #         dnslists      = black.list.example
  #############################################################################

  # Accept if the address is in a local domain, but only if the recipient can
  # be verified. Otherwise deny. The "endpass" line is the border between
  # passing on to the next ACL statement (if tests above it fail) or denying
  # access (if tests below it fail).

  accept  domains       = +local_domains
          endpass
          verify        = recipient

  # Accept if the address is in a domain for which we are relaying, but again,
  # only if the recipient can be verified.

  accept  domains       = +relay_to_domains
          endpass
          verify        = recipient

  # If control reaches this point, the domain is neither in +local_domains
  # nor in +relay_to_domains.

  # Accept if the message comes from one of the hosts for which we are an
  # outgoing relay. Recipient verification is omitted here, because in many
  # cases the clients are dumb MUAs that don't cope well with SMTP error
  # responses. If you are actually relaying out from MTAs, you should probably
  # add recipient verification here.

  accept  hosts         = +relay_from_hosts

  # Accept if the message arrived over an authenticated connection, from
  # any host. Again, these messages are usually from MUAs, so recipient
  # verification is omitted.

  accept  authenticated = *

  # Reaching the end of the ACL causes a "deny", but we might as well give
  # an explicit message.

  deny    message       = relay not permitted

warn  log_message = verified peer dn $tls_peerdn
        condition = $tls_certificate_verified

  accept condition = $tls_certificate_verified

#deny  message = This message contains an unwanted file extension ($found_extension)
#        demime = scr:vbs:bat:lnk:pif:exe

######################################################################
#                      ROUTERS CONFIGURATION                         #
#               Specifies how addresses are handled                  #
######################################################################
#     THE ORDER IN WHICH THE ROUTERS ARE DEFINED IS IMPORTANT!       #
# An address is passed to each router in turn until it is accepted.  #
######################################################################

begin routers

# This router routes to remote hosts over SMTP by explicit IP address,
# when an email address is given in "domain literal" form, for example,
# . The RFCs require this facility. However, it is
# little-known these days, and has been exploited by evil people seeking
# to abuse SMTP relays. Consequently it is commented out in the default
# configuration. If you uncomment this router, you also need to uncomment
# allow_domain_literals above, so that Exim can recognize the syntax of
# domain literal addresses.

# domain_literal:
#   driver = ipliteral
#   domains = ! +local_domains
#   transport = remote_smtp

# This router routes addresses that are not in local domains by doing a DNS
# lookup on the domain name. Any domain that resolves to 0.0.0.0 or to a
# loopback interface address (127.0.0.0/8) is treated as if it had no DNS
# entry. Note that 0.0.0.0 is the same as 0.0.0.0/32, which is commonly treated
# as the local host inside the network stack. It is not 0.0.0.0/0, the default
# route. If the DNS lookup fails, no further routers are tried because of
# the no_more setting, and consequently the address is unrouteable.
#amavis:
#        driver = manualroute
#        condition = "${if eq {$interface_port}{10025} {0}{1}}"
#        # if scanning incoming mails, uncomment the following line and
#        # change local_domains accordingly
#        #domains = +local_domains
#        transport = amavis
#        #route_list = "* localhost byname"
#	route_list = "* 127.0.0.1"
#	no_verify
 #       self = send

#fax:
#driver = manualroute
#transport = fax
#route_list ="*fax"

smarthost_auto:
    domains = ! +local_domains
    condition = "${extract{3}{:}{${lookup{$sender_address}lsearch*\
                {/etc/exim4/passwd.user}{$value}fail}}}"
    driver = manualroute
    transport = remote_smtp
    route_list = "* ${extract{3}{:}{${lookup{$sender_address}lsearch*\
                {/etc/exim4/passwd.user}{$value}fail}}}"
    host_find_failed = defer
    same_domain_copy_routing = yes
   ignore_target_hosts = 192.168.0.0/16 :\
                       172.16.0.0/12 : 10.0.0.0/8 : 169.254.0.0/16 : ext.mond.myhome
   # no_more

dnslookup:
  debug_print = "R: dnslookup for $local_part@$domain"
  driver = dnslookup
  domains = ! +local_domains
  transport = remote_smtp
  same_domain_copy_routing = yes
  ignore_target_hosts = 0.0.0.0 : 127.0.0.0/8 : 192.168.0.0/16 :\
                        172.16.0.0/12 : 10.0.0.0/8 : 169.254.0.0/16
  no_more

# The remaining routers handle addresses in the local domain(s).

# This router handles aliasing using a linearly searched alias file with the
# name /etc/aliases. When this configuration is installed automatically,
# the name gets inserted into this file from whatever is set in Exim's
# build-time configuration. The default path is the traditional /etc/aliases.
# If you install this configuration by hand, you need to specify the correct
# path in the "data" setting below.
#
##### NB  You must ensure that the alias file exists. It used to be the case
##### NB  that every Unix had that file, because it was the Sendmail default.
##### NB  These days, there are systems that don't have it. Your aliases
##### NB  file should at least contain an alias for "postmaster".
#
# If any of your aliases expand to pipes or files, you will need to set
# up a user and a group for these deliveries to run under. You can do
# this by uncommenting the "user" option below (changing the user name
# as appropriate) and adding a "group" option if necessary. Alternatively, you
# can specify "user" on the transports that are used. Note that the transports
# listed below are the same as are used for .forward files; you might want
# to set up different ones for pipe and file deliveries from aliases.

system_aliases:
 debug_print = "R: system_aliases for $local_part@$domain"
  driver = redirect
  allow_fail
  allow_defer
  data = ${lookup{$local_part}lsearch{/etc/aliases}}
# user = exim
  file_transport = address_file
  pipe_transport = address_pipe

# This router handles forwarding using traditional .forward files in users'
# home directories. If you want it also to allow mail filtering when a forward
# file starts with the string "# Exim filter" or "# Sieve filter", uncomment
# the "allow_filter" option.

# If you want this router to treat local parts with suffixes introduced by "-"
# or "+" characters as if the suffixes did not exist, uncomment the two local_
# part_suffix options. Then, for example, xxxx-foo@your.domain will be treated
# in the same way as xxxx@your.domain by this router. You probably want to make
# the same change to the localuser router.

# The no_verify setting means that this router is skipped when Exim is
# verifying addresses. Similarly, no_expn means that this router is skipped if
# Exim is processing an EXPN command.

# The check_ancestor option means that if the forward file generates an
# address that is an ancestor of the current one, the current one gets
# passed on instead. This covers the case where A is aliased to B and B
# has a .forward file pointing to A.

# The three transports specified at the end are those that are used when
# forwarding generates a direct delivery to a file, or to a pipe, or sets
# up an auto-reply, respectively.

#userforward:
#  driver = redirect
#  check_local_user
# local_part_suffix = +* : -*
# local_part_suffix_optional
#  file = $home/.forward
# allow_filter
#  no_verify
#  no_expn
#  check_ancestor
#  file_transport = address_file
#  pipe_transport = address_pipe
#  reply_transport = address_reply

userforward:
  debug_print = "R: userforward for $local_part@$domain"
  driver = redirect
  domains = +local_domains
  check_local_user
  file = $home/.forward
  no_verify
  no_expn
  check_ancestor
  allow_filter
  directory_transport = address_directory
  file_transport = address_file
  pipe_transport = address_pipe
  reply_transport = address_reply
  skip_syntax_errors
  syntax_errors_to = real-$local_part@$domain
  syntax_errors_text = \
    This is an automatically generated message. An error has\n\
    been found in your .forward file. Details of the error are\n\
    reported below. While this error persists, you will receive\n\
    a copy of this message for every message that is addressed\n\
    to you. If your .forward file is a filter file, or if it is\n\
    a non-filter file containing no valid forwarding addresses,\n\
    a copy of each incoming message will be put in your normal\n\
    mailbox. If a non-filter file contains at least one valid\n\
    forwarding address, forwarding to the valid addresses will\n\
    happen, and those will be the only deliveries that occur.

# This router matches local user mailboxes. If the router fails, the error
# message is "Unknown user".

# If you want this router to treat local parts with suffixes introduced by "-"
# or "+" characters as if the suffixes did not exist, uncomment the two local_
# part_suffix options. Then, for example, xxxx-foo@your.domain will be treated
# in the same way as xxxx@your.domain by this router.

#procmail:
#  debug_print = "R: procmail for $local_part@$domain"
#  driver = accept
#  domains = +local_domains
#  check_local_user
#  transport = procmail_pipe
  # emulate OR with "if exists"-expansion
#  require_files = ${local_part}:\
#                  ${if exists{/etc/procmailrc}\
#                    {/etc/procmailrc}{${home}/.procmailrc}}:\
#                  +/usr/bin/procmail
#  no_verify
#  no_expn

local_user:
  debug_print = "R: local_user for $local_part@$domain"
  driver = accept
  domains = +local_domains
  check_local_user
  local_parts = ! root
  transport = local_delivery

#maildrop:
#  debug_print = "R: maildrop for $local_part@$domain"
#  driver = accept
#  domains = +local_domains
#  check_local_user
#  transport = maildrop_pipe
#  require_files = ${local_part}:${home}/.mailfilter:+/usr/bin/maildrop
#  no_verify
#  no_expn

real_local:
  debug_print = "R: real_local for $local_part@$domain"
  driver = accept
  domains = +local_domains
  local_part_prefix = real-
  check_local_user
  transport = local_delivery

mail4root:
  debug_print = "R: mail4root for $local_part@$domain"
  driver = redirect
  domains = +local_domains
  data = /var/mail/mail
  file_transport = address_file
  local_parts = root
  user = tobias
  group = mail
#######################################

shared_folders:
  local_parts = "shared"
  driver = accept
  transport = maildir_shared_folder

######################################################################
#                      TRANSPORTS CONFIGURATION                      #
######################################################################
#                       ORDER DOES NOT MATTER                        #
#     Only one appropriate transport is called for each delivery.    #
######################################################################

# A transport is used only when referenced from a router that successfully
# handles an address.

begin transports
#amavis:
#      driver = smtp
#      port = 10024
#      allow_localhost

#fax:
#driver = pipe
#user = exim
#command ="/usr/local/bin/faxmail -d -n ${local_part}"
#home_directory = /tmp

# This transport is used for delivering messages over SMTP connections.

#remote_smtp:
#  driver = smtp
remote_smtp:
    debug_print = "T: remote_smtp for $local_part@$domain"
    driver = smtp

    hosts_try_auth = "${extract{3}{:}{${lookup{$sender_address}lsearch*\
                        {/etc/exim4/passwd.user}{$value}fail}}}"

# This transport is used for local delivery to user mailboxes in traditional
# BSD mailbox format. By default it will be run under the uid and gid of the
# local user, and requires the sticky bit to be set on the /var/mail directory.
# Some systems use the alternative approach of running mail deliveries under a
# particular group instead of using the sticky bit. The commented options below
# show how this can be done.

#local_delivery:
#  driver = appendfile
#  file = /var/mail/$local_part
#  delivery_date_add
#  envelope_to_add
#  return_path_add
# group = mail
# mode = 0660

local_delivery:
  driver = appendfile
  directory = $home/Maildir
  delivery_date_add
  envelope_to_add
  return_path_add
  maildir_format
  mode = 0600
  mode_fail_narrower = false

# This transport is used for handling pipe deliveries generated by alias or
# .forward files. If the pipe generates any standard output, it is returned
# to the sender of the message as a delivery error. Set return_fail_output
# instead of return_output if you want this to happen only when the pipe fails
# to complete normally. You can set different transports for aliases and
# forwards if you want to - see the references to address_pipe in the routers
# section above.

address_directory:
  debug_print = "T: address_directory for $local_part@$domain"
  driver = appendfile
  envelope_to_add = true
  return_path_add = true
  check_string = ""
  escape_string = ""
  maildir_format

address_pipe:
debug_print = "T: address_pipe for $local_part@$domain"
  driver = pipe
  return_output

# This transport is used for handling deliveries directly to files that are
# generated by aliasing or forwarding.

address_file:
  debug_print = "T: address_file for $local_part@$domain"
  driver = appendfile
  delivery_date_add
  envelope_to_add
  return_path_add

# This transport is used for handling autoreplies generated by the filtering
# option of the userforward router.

address_reply:
  debug_print = "T: autoreply for $local_part@$domain"
 driver = autoreply

# procmail_pipe:
 # debug_print = "T: procmail_pipe for $local_part@$domain"
#   driver = pipe
#  path = "/bin:/usr/bin:/usr/local/bin"
#   command = "/usr/bin/procmail -t -d ${local_part}"
#   #from_hack
#   return_path_add
#   delivery_date_add
#   envelope_to_add
#   check_string = "From "
#   escape_string = ">From "
#   user = $local_part
#   group = mail

maildir_home:
  debug_print = "T: maildir_home for $local_part@$domain"
  driver = appendfile
  directory = $home/Maildir
  delivery_date_add
  envelope_to_add
  return_path_add
  maildir_format
  mode = 0600
  mode_fail_narrower = false

#maildrop_pipe:
#  debug_print = "T: maildrop_pipe for $local_part@$domain"
#  driver = pipe
#  path = "/bin:/usr/bin:/usr/local/bin"
#  command = "/usr/bin/maildrop"
#  return_path_add
#  delivery_date_add
#  envelope_to_add

# This transport is used for local delivery to user mailboxes in traditional
# BSD mailbox format.
#
#mail_spool:
#  debug_print = "T: appendfile for $local_part@$domain"
#  driver = appendfile
#  file = /var/mail/$local_part
#  delivery_date_add
#  envelope_to_add
#  return_path_add
#  group = mail
#  mode = 0660
#  mode_fail_narrower = false

 # This transport saves messages in shared folders for special mail
# addresses defined in the 'shared_folders' router - to allow workgroup
# style mail handling with Courier IMAP server (and clients which
# support shared folders)

maildir_shared_folder:
  driver = appendfile
  maildir_format = true
  directory = /srv/courier/.${local_part}/
  create_directory = true
  check_string = ""
  escape_string = ""
  delivery_date_add
  envelope_to_add
  return_path_add
  mode = 0777
  no_mode_fail_narrower
  user = Debian-exim
  group = Debian-exim
######################################################################
#                      RETRY CONFIGURATION                           #
######################################################################

begin retry

# This single retry rule applies to all domains and all errors. It specifies
# retries every 15 minutes for 2 hours, then increasing retry intervals,
# starting at 1 hour and increasing each time by a factor of 1.5, up to 16
# hours, then retries every 6 hours until 4 days have passed since the first
# failed delivery.

# Address or Domain    Error       Retries
# -----------------    -----       -------

*                      *           F,2h,15m; G,16h,1h,1.5; F,4d,6h

######################################################################
#                      REWRITE CONFIGURATION                         #
######################################################################

# There are no rewriting specifications in this default configuration file.

begin rewrite

*@+local_domains ${lookup{${local_part}}lsearch{/etc/exim4/email-addresses}\
                   {$value}fail} Ffrs

######################################################################
#                   AUTHENTICATION CONFIGURATION                     #
######################################################################

# There are no authenticator specifications in this default configuration file.

begin authenticators
#cram_md5:
#    driver = cram_md5
##    public_name = CRAM-MD5
#    client_name = "${extract{4}{:}{${lookup{$sender_address}lsearch*\
#                    {/etc/exim4/passwd.user}{$value}fail}}}"
 ##   client_secret = "${extract{5}{:}{${lookup{$sender_address}lsearch*\
#                    {exim4/passwd.user}{$value}fail}}}"

plain:
    driver = plaintext
    public_name = PLAIN
    client_send = "^${extract{4}{::}\
                    {${lookup{$sender_address}lsearch*\
                    {/etc/exim4/passwd.user}{$value}fail}}}\
                    ^${extract{5}{::}\
                    {${lookup{$sender_address}lsearch*\
                    {/etc/exim4/passwd.user}{$value}fail}}}"

login:
    driver = plaintext
    public_name = LOGIN
    client_send = ": ${extract{4}{::}\
                    {${lookup{$sender_address}lsearch*\
                    {/etc/exim4/passwd.user}{$value}fail}}}\
                    : ${extract{5}{::}\
                    {${lookup{$sender_address}lsearch*\
                    {/etc/exim4/passwd.user}{$value}fail}}}"

 plain_saslauthd_server:
   driver = plaintext
   public_name = PLAIN
   # don't send system passwords over unencrypted connections
   server_advertise_condition = ${if eq{$tls_cipher}{}{0}{1}}
   server_condition = ${if saslauthd{{$2}{$3}}{1}{0}}
   server_set_id = $2
   server_prompts = :

 login_saslauthd_server:
   driver = plaintext
   public_name = LOGIN
   server_prompts = "Username:: : Password::"
   # don't send system passwords over unencrypted connections
   server_advertise_condition = ${if eq{$tls_cipher}{}{0}{1}}
   server_condition = ${if saslauthd{{$1}{$2}}{1}{0}}
   server_set_id = $1

 cram_md5_server:
   driver = cram_md5
   public_name = CRAM-MD5
   server_secret = ${extract{2}{:}{${lookup{$1}lsearch{CONFDIR/passwd}{$value}fail}}}
   server_set_id = $1

######################################################################
#                   CONFIGURATION FOR local_scan()                   #
######################################################################

# If you have built Exim to include a local_scan() function that contains
# tables for private options, you can define those options here. Remember to
# uncomment the "begin" line. It is commented by default because it provokes
# an error with Exim binaries that are not built with LOCAL_SCAN_HAS_OPTIONS
# set in the Local/Makefile.

# begin local_scan

# End of Exim configuration file 

#######################################################################
#####################################################################
/etc/exim4/passwd.user

###########################################################################
### Example for /etc/exim4/passwd.user
###########################################################################
###
### Last Update: Sat, 22 May 2004 16:14:08 +0200
###
### Die E-Mailadresse steht zweimal am Anfang (sehr wichtig fuer die
### Fehlerbehandlung!). Danach steht der lokale Username, gefolgt vom
### entsprechenden Smarthost. Am Ende stehen Benutzerkennung und Passwort
### vom Provider. Alle Eintraege werden mit einfachen Doppelpunkt getrennt.
###
### Die Raute '#' ist in dieser Datei das Kommentarzeichen.
###
###########################################################################
mail_adresse@gmx.net:mail_adresse@gmx.net:ocaler_gmx_nutzer:mail.gmx.net:1234567:passwort
mail2_adresse@web.de:mail2_adresse@web.de:localer_webde_nutzer:smtp.web.de:mail2_adresse:passwort

############################################################
/etc/default/saslauthd:

#
# Settings for saslauthd daemon
# Please read /usr/share/doc/sasl2-bin/README.Debian for details.
#

# Should saslauthd run automatically on startup? (default: no)
START=yes

# Description of this saslauthd instance. Recommended.
# (suggestion: SASL Authentication Daemon)
DESC="SASL Authentication Daemon"

# Short name of this saslauthd instance. Strongly recommended.
# (suggestion: saslauthd)
NAME="saslauthd"

# Which authentication mechanisms should saslauthd use? (default: pam)
#
# Available options in this Debian package:
# getpwent -- use the getpwent() library function
# kerberos5 -- use Kerberos 5
# pam -- use PAM
# rimap -- use a remote IMAP server
# shadow -- use the local shadow password file
# sasldb -- use the local sasldb database file
# ldap -- use LDAP (configuration is in /etc/saslauthd.conf)
#
# Only one option may be used at a time. See the saslauthd man page
# for more information.
#
# Example: MECHANISMS="pam"
MECHANISMS="pam"

# Additional options for this mechanism. (default: none)
# See the saslauthd man page for information about mech-specific options.
MECH_OPTIONS=""

# How many saslauthd processes should we run? (default: 5)
# A value of 0 will fork a new process for each connection.
THREADS=5

# Other options (default: -c -m /var/run/saslauthd)
# Note: You MUST specify the -m option or saslauthd won't run!
#
# WARNING: DO NOT SPECIFY THE -d OPTION.
# The -d option will cause saslauthd to run in the foreground instead of as
# a daemon. This will PREVENT YOUR SYSTEM FROM BOOTING PROPERLY. If you wish
# to run saslauthd in debug mode, please run it by hand to be safe.
#
# See /usr/share/doc/sasl2-bin/README.Debian for Debian-specific information.
# See the saslauthd man page and the output of 'saslauthd -h' for general
# information about these options.
#
# Example for postfix users: "-c -m /var/spool/postfix/var/run/saslauthd"
OPTIONS="-c -m /var/run/saslauthd"

Hier meine Postfix Konfiguration auf Ubuntu Jaunty Jackalope mit folgenden Merkmalen :
-Der Server nutzt Verschlüsselung
- Der Server verlangt SMTP Auth für Versand ( Passwörter von PAM bezogen)
- Der Server legt Mails im Maildirformat ab ( Nutzung mit Courier IMAP)
- Je nach Absender werden die Mails über verschiedene Mailserver Versendet.

Folgende Pakete werden benötigt:
postfix
libsasl2-modules
sasl2-bin

Postfix muss in der sasl Gruppe sein:
Dazu folgender Befehl:
adduser postfix sasl

/etc/default/saslauthd:

#
# Settings for saslauthd daemon
# Please read /usr/share/doc/sasl2-bin/README.Debian for details.
#

# Should saslauthd run automatically on startup? (default: no)
START=yes

# Description of this saslauthd instance. Recommended.
# (suggestion: SASL Authentication Daemon)
DESC="SASL Authentication Daemon"

# Short name of this saslauthd instance. Strongly recommended.
# (suggestion: saslauthd)
NAME="saslauthd"

# Which authentication mechanisms should saslauthd use? (default: pam)
#
# Available options in this Debian package:
# getpwent  -- use the getpwent() library function
# kerberos5 -- use Kerberos 5
# pam       -- use PAM
# rimap     -- use a remote IMAP server
# shadow    -- use the local shadow password file
# sasldb    -- use the local sasldb database file
# ldap      -- use LDAP (configuration is in /etc/saslauthd.conf)
#
# Only one option may be used at a time. See the saslauthd man page
# for more information.
#
# Example: MECHANISMS="pam"
MECHANISMS="pam"

# Additional options for this mechanism. (default: none)
# See the saslauthd man page for information about mech-specific options.
MECH_OPTIONS=""

# How many saslauthd processes should we run? (default: 5)
# A value of 0 will fork a new process for each connection.
THREADS=5

# Other options (default: -c -m /var/run/saslauthd)
# Note: You MUST specify the -m option or saslauthd won't run!
#
# WARNING: DO NOT SPECIFY THE -d OPTION.
# The -d option will cause saslauthd to run in the foreground instead of as
# a daemon. This will PREVENT YOUR SYSTEM FROM BOOTING PROPERLY. If you wish
# to run saslauthd in debug mode, please run it by hand to be safe.
#
# See /usr/share/doc/sasl2-bin/README.Debian for Debian-specific information.
# See the saslauthd man page and the output of 'saslauthd -h' for general
# information about these options.
#
# Example for postfix users: "-c -m /var/spool/postfix/var/run/saslauthd"
OPTIONS="-c -m /var/run/saslauthd"

######################################################################
/etc/postfix/sasl/smtpd.conf

pwcheck_method: saslauthd
mech_list: PLAIN LOGIN
saslauthd_path: /var/run/saslauthd/mux

#####################################################################
/etc/postfix/main.cf

# See /usr/share/postfix/main.cf.dist for a commented, more complete version

# Debian specific:  Specifying a file name will cause the first
# line of that file to be used as the name.  The Debian default
# is /etc/mailname.
#myorigin = /etc/mailname

smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu)
biff = no

# appending .domain is the MUA's job.
append_dot_mydomain = no

# Uncomment the next line to generate "delayed mail" warnings
#delay_warning_time = 4h

readme_directory = no

# TLS parameters
smtpd_tls_cert_file = /etc/ssl/certs/ssl-cert-snakeoil.pem
smtpd_tls_key_file = /etc/ssl/private/ssl-cert-snakeoil.key

smtpd_tls_security_level=may
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache

# See /usr/share/doc/postfix/TLS_README.gz in the postfix-doc package for
# information on enabling SSL in the smtp client.

myhostname = mond
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
mydestination =  localhost.localdomain, localhost, hostname.des.servers
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = all
home_mailbox = Maildir/
message_size_limit = 50000000
myorigin = /etc/mailname

inet_protocols = all

transport_maps = hash:/etc/postfix/transport

smtp_tls_security_level = may
smtp_sasl_security_options = noanonymous
smtp_sender_dependent_authentication = yes
smtp_sasl_auth_enable = yes
smtp_connection_cache_on_demand = no
smtp_sasl_password_maps = hash:/etc/postfix/sasl_password
sender_dependent_relayhost_maps = hash:/etc/postfix/sender_dependent
sender_canonical_maps = hash:/etc/postfix/sender_canonical

smtpd_sasl_auth_enable =yes
smtpd_sasl_path = smtpd
smtpd_tls_auth_only=yes
broken_sasl_auth_clients = yes

smtpd_recipient_restrictions =
    permit_mynetworks, permit_sasl_authenticated,reject

#########################################################################

/etc/postfix/master.cf

#
# Postfix master process configuration file.  For details on the format
# of the file, see the master(5) manual page (command: "man 5 master").
#
# Do not forget to execute "postfix reload" after editing this file.
#
# ==========================================================================
# service type  private unpriv  chroot  wakeup  maxproc command + args
#               (yes)   (yes)   (yes)   (never) (100)
# ==========================================================================
smtp      inet  n       -       n       -       -       smtpd
#submission inet n       -       -       -       -       smtpd
#  -o smtpd_tls_security_level=encrypt
#  -o smtpd_sasl_auth_enable=yes
#  -o smtpd_client_restrictions=permit_sasl_authenticated,reject
#  -o milter_macro_daemon_name=ORIGINATING
#smtps     inet  n       -       -       -       -       smtpd
#  -o smtpd_tls_wrappermode=yes
#  -o smtpd_sasl_auth_enable=yes
#  -o smtpd_client_restrictions=permit_sasl_authenticated,reject
#  -o milter_macro_daemon_name=ORIGINATING
#628      inet  n       -       -       -       -       qmqpd
pickup    fifo  n       -       -       60      1       pickup
cleanup   unix  n       -       -       -       0       cleanup
qmgr      fifo  n       -       n       300     1       qmgr
#qmgr     fifo  n       -       -       300     1       oqmgr
tlsmgr    unix  -       -       -       1000?   1       tlsmgr
rewrite   unix  -       -       -       -       -       trivial-rewrite
bounce    unix  -       -       -       -       0       bounce
defer     unix  -       -       -       -       0       bounce
trace     unix  -       -       -       -       0       bounce
verify    unix  -       -       -       -       1       verify
flush     unix  n       -       -       1000?   0       flush
proxymap  unix  -       -       n       -       -       proxymap
proxywrite unix -       -       n       -       1       proxymap
smtp      unix  -       -       -       -       -       smtp
# When relaying mail as backup MX, disable fallback_relay to avoid MX loops
relay     unix  -       -       -       -       -       smtp
	-o smtp_fallback_relay=
#       -o smtp_helo_timeout=5 -o smtp_connect_timeout=5
showq     unix  n       -       -       -       -       showq
error     unix  -       -       -       -       -       error
retry     unix  -       -       -       -       -       error
discard   unix  -       -       -       -       -       discard
local     unix  -       n       n       -       -       local
virtual   unix  -       n       n       -       -       virtual
lmtp      unix  -       -       -       -       -       lmtp
anvil     unix  -       -       -       -       1       anvil
scache    unix  -       -       -       -       1       scache
#
# ====================================================================
# Interfaces to non-Postfix software. Be sure to examine the manual
# pages of the non-Postfix software to find out what options it wants.
#
# Many of the following services use the Postfix pipe(8) delivery
# agent.  See the pipe(8) man page for information about ${recipient}
# and other message envelope options.
# ====================================================================
#
# maildrop. See the Postfix MAILDROP_README file for details.
# Also specify in main.cf: maildrop_destination_recipient_limit=1
#
maildrop  unix  -       n       n       -       -       pipe
  flags=DRhu user=vmail argv=/usr/bin/maildrop -d ${recipient}
#
# See the Postfix UUCP_README file for configuration details.
#
uucp      unix  -       n       n       -       -       pipe
  flags=Fqhu user=uucp argv=uux -r -n -z -a$sender - $nexthop!rmail ($recipient)
#
# Other external delivery methods.
#
ifmail    unix  -       n       n       -       -       pipe
  flags=F user=ftn argv=/usr/lib/ifmail/ifmail -r $nexthop ($recipient)
bsmtp     unix  -       n       n       -       -       pipe
  flags=Fq. user=bsmtp argv=/usr/lib/bsmtp/bsmtp -t$nexthop -f$sender $recipient
scalemail-backend unix	-	n	n	-	2	pipe
  flags=R user=scalemail argv=/usr/lib/scalemail/bin/scalemail-store ${nexthop} ${user} ${extension}
mailman   unix  -       n       n       -       -       pipe
  flags=FR user=list argv=/usr/lib/mailman/bin/postfix-to-mailman.py
  ${nexthop} ${user}

##########################################################

/etc/postfix/sasl_passwort

#email servernutzername:passwort
meine_mail@gmx.net 123456:passwort
meine2_mail@web.de maine2_mail:passwort

##########################################################

/etc/postfix/sender_canonical

#localer_User externe Mail
user1 meine_mail@gmx.net
user2 meine2_mail@web.de

#######################################################

/etc/postfix/sender_dependent

#email mailserver
meine_mail@gmx.net mail.gmx.net
meine2_mail@web.de smtp.web.de

##########################################################

Zum Schluss müssen Datenbanken ins Postfixformat konvertiert werden:

sudo postmap /etc/postfix/sender_canonical
sudo postmap /etc/postfix/sender_dependent
sudo postmap /etc/postfix/sasl_password

Und ein Neustart von Postfix ist erforderlich :

sudo /etc/init.d/postfix restart

In der Standart Einstellung verweigert Postfix die Annahme von Mails größer als 10 MB.

Wenn man in der Datei  /etc/postfix/main.cf
message_size_limit = 50000000

einfügt erhöht man das Limit auf 50 MB . Die Zahl ist bei Bedarf anpassbar.

Dazu braucht man das Programm mail auch oft unter dem Namen nail installiert.

echo ” Main Text ” | mail empfänger@der.mail