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FreeBSD: postfix mail server

by Kliment Andreev
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A newer and more detailed version -> here.

When I replaced my old desktop FreeBSD router/gateway, I also decided to replace the MTA (mail transport agent). I was using qmail for a while and never had any problems. I figured it’s time to replace qmail because it’s no longer supported by its author and there are some fetaures that I might need in near future that qmail doesn’t support (IPv6 for example).

FreeBSD comes with sendmail installed but I think that this is the most difficult program to work with. The configuration file is cryptic and very confusing. So I decided to go with postfix. Installation and configuration is very easy. First, let’s install it.

cd /usr/ports/mail/postfix
make all install clean

Then, edit /etc/rc.conf and add the following lines:

postfix
postfix_enable="yes"
sendmail_enable="NO"
sendmail_submit_enable="NO
sendmail_outbound_enable="NO"

We should remove some periodic processes that were part of sendmail as well. Edit /etc/periodic.conf and add the following lines:

# postfix & sendmail maintenance
daily_clean_hoststat_enable="NO"
daily_status_mail_rejects_enable="NO"
daily_status_include_submit_mailq="NO"
daily_submit_queuerun="NO"

I also want root’s email to be forwarded to my other account, so I edited /etc/aliases, uncommented the line that says root: you and replaced you with my login name. Remember to update the aliases database with /usr/local/bin/newaliases. postfix comes with a configuration file in /usr/local/etc/postfix/main.cf. The only thing that I changed were the following lines:

myhostname = tripnotic.chombe.org
mydomain = chombe.org
myorigin = $mydomain
mynetworks = 127.0.0.1/8, 192.168.1.0/24, 172.16.0.0/16, 10.1.0.0/8
mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain

You can read the meanings of these lines in the comments in the file. They are very self-explanatory. Once I am done with postfix, let’s get rid of running sendmail and start postfix.

killall sendmail
sh /usr/local/etc/rc.d/postfix start

If you make any changes in main.cf use postfix reload instead of postfix stop && postfix start. When you send or receive e-mails, you can check if everything is OK with

tail -f /var/log/maillog. 
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