[Exim] Newbie type question

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Author: David Chait
Date:  
To: exim-users
Subject: [Exim] Newbie type question
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Greetings all,
    I am having a slight issue with my new install of Exim in that it is readdressing some outgoing mail to look like it came from the local machine (fops-gateway.stanford.edu) rather than the published account name (*@bonair.stanford.edu). Is there something I can easilly change here to resolve this? I have included my configure file in this mailing, thanks in advance for any assistance you might be able to provide. (Yes I know it's set up as an open relay right now, our AV software handles the relay controls).


David Chait

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

# 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 = bonair.stanford.edu



# 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 = bonair.stanford.edu : pssi.stanford.edu : fops-gateway.stanford.edu

domainlist relay_to_domains =

hostlist relay_from_hosts = *

# 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@???", 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@???" 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 = stanford.edu



# 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 = bonair.stanford.edu



# The following line must be uncommented if you want Exim to recognize

# addresses of the form "user@???" 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. 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

# home dir for mailman

MAILMAN_HOME=/home/mailman

# wrapper script for mailman

MAILMAN_WRAP=MAILMAN_HOME/mail/wrapper

# user and group for mailman

MAILMAN_UID=mailman

MAILMAN_GID=mailman





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

# 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 = :

# Deny if the local part contains @ or % or / or | or !. These are rarely

# found in genuine local parts, but are often tried by people looking to

# circumvent relaying restrictions.

# Also deny if the local part starts with a dot. Empty components aren't

# strictly legal in RFC 2822, but Exim allows them because this is common.

# However, actually starting with a dot may cause trouble if the local part

# is used as a file name (e.g. for a mailing list).

deny 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

message = unknown user

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

message = unrouteable address

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





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

# 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,

# <user@???>. 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.

dnslookup:

driver = dnslookup

domains = ! +local_domains

transport = remote_smtp

ignore_target_hosts = 0.0.0.0 : 127.0.0.0/8

no_more



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



# This router handles aliasing using a traditional /etc/aliases file.

#

##### NB You must ensure that /etc/aliases 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:

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", uncomment the "allow_filter"

# option.

# 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

file = $home/.forward

no_verify

no_expn

check_ancestor

# allow_filter

file_transport = address_file

pipe_transport = address_pipe

reply_transport = address_reply



# This router matches local user mailboxes.

localuser:

driver = accept

check_local_user

transport = local_delivery





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

# 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



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

remote_smtp:

driver = smtp



# 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



# 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_pipe:

driver = pipe

return_output



# This transport is used for handling deliveries directly to files that are

# generated by aliasing or forwarding.

address_file:

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:

driver = autoreply

list_transport:

driver = pipe

command = MAILMAN_WRAP post ${lc:$local_part}

current_directory = MAILMAN_HOME

home_directory = MAILMAN_HOME

user = MAILMAN_UID

group = MAILMAN_GID

list_request_transport:

driver = pipe

command = MAILMAN_WRAP mailcmd ${lc:$local_part}

current_directory = MAILMAN_HOME

home_directory = MAILMAN_HOME

user = MAILMAN_UID

group = MAILMAN_GID


list_admin_transport:

driver = pipe

command = MAILMAN_WRAP mailowner ${lc:$local_part}

current_directory = MAILMAN_HOME

home_directory = MAILMAN_HOME

user = MAILMAN_UID

group = MAILMAN_GID



mailman_list_pipe:

driver = pipe

allow_commands = /home/mailman/mail/wrapper

user = mailman

group = mailman

return_fail_output



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

# 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.

# 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





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

# AUTHENTICATION CONFIGURATION #

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

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

begin authenticators



# End of Exim configuration file

--