Domanized Aliases (sendmail)

Abstract

The document describes how to make sendmail process corectly user@local.domain aliases. Without it sendmail ignores local.domaim during aliases expansion.

THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
THE AUTHOR NAME MUST BE QUOTED IN ANY WORK DERIVATED FROM THE WORK.

Usage

Define "domanized" aliases in aliases file (in /etc/mail/ or /etc/ directory).

user1@first.local.domain:   user1@domain2.com,\user1
user1@second.local.domain:  userx@nowhere.com

Install

Fix small bug present in cf/m4/proto.m4 of 8.12.6. In pre DH line comment it is declared (but not implemented) that "$R has precedence for unqualified names" [I have reported the bug to sendmail-bugs@sendmail.org]

Change order of MAIL_HUB and MAIL_RELAY processing.

Apply the patch (signature) - in main directory of sendmail distribtion execute
```
patch -p0 < RH.patch
```

Apply required changes to *.mc file:

dnl relay user@localdomain via MAIL_HUB
FEATURE(`stickyhost')dnl
define(`MAIL_HUB',`procmail:/etc/procmailrc/catch.rc')dnl
dnl ignore MAIL_HUB for recipients without domain
define(`LOCAL_RELAY',`$j')dnl

dnl turn on alaises and S5 processing for procmail mailer
MODIFY_MAILER_FLAGS(`PROCMAIL',`+A5')dnl
MAILER(procmail)dnl

LOCAL_RULESETS
SLocal_localaddr
# Strip domain part of recipient address
R$+@$+  $# local $: $1

Tests

Generate sendmail-test.cf as described in install section.

Add domanized aliases to aliases file e.g.

user1@first.local.domain:   user1@domain2.com,\user1

Compile new aliases database using sendmail-test.cf
```
newaliases -C sendmail-test.cf
```

Test it using

sendmail -C sendmail-test.c -d27.2 user1@first.local.domain

Additional

A wonderful quote apropos the bug mentioned in install section:

If the code and the comments disagree, then both are probably wrong.
-- Norm Schryer

Original Posting

The posting
Subject: Domanized aliases
Date: 2002-10-27
Newsgroups: comp.mail.sendmail
Message-ID: <3DBBEA84.6A656833@Andrzej.Adam.Filip>