Ubuntu mail server switch to Postfix from Sendmail

postfixsendmailUbuntu

Sendmail is running as default as mail server on Ubuntu. How to switch to postfix.

Best Answer

I have extensive experience with Postfix.

The quickest and easiest way to do this on Ubuntu is:

sudo apt-get install postfix

This will remove sendmail (it will install a version appropriate for postfix).

You will then need to configure postfix.

Do you also have questions about configuration?

To have decent settings choose "internet site" during the installation process.

You can get away with a config file as short as this:

sudo nano /etc/postfix/main.cf

myhostname = mail.somesite.com

mydestination = $myhostname

myorigin = $myhostname

relay_domains = $myhostname

Be very, very careful about avoiding setting up an open relay server. You'll quickly get blacklisted.

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Migrating sendmail mailboxes to postfix

Postfix can deliver to mbox files just fine, no work needed. Just make sure that your mailbox_command or virtual_mailbox_maps points to the correctly.

Ubuntu – PHP mail() not working with Postfix on Ubuntu

Oh, I fixed the problem by following the information in this forum:

http://ubuntuforums.org/showthread.php?t=666018

Basically, I looked in my /var/log/mail.log error file and found the error message "unable to look up public/pickup: no such file or directory".

I then issued the command

sudo mkfifo /var/spool/postfix/public/pickup

I made sure sendmail wasn't still running by doing a ps -aux and killing it

root@cpu:/var/log# ps aux | grep mail
root      2363  0.0  0.5   9228  1888 ?        Ss   Jan28   0:20 sendmail: MTA: accepting connections          
root     23914  0.0  0.2   3040   792 pts/0    S+   11:33   0:00 grep mail
root@cpu:/var/log# kill 2363

I restarted postfix

sudo /etc/init.d/postfix restart

And now the PHP mail function works.

Best Answer

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Migrating sendmail mailboxes to postfix

Ubuntu – PHP mail() not working with Postfix on Ubuntu

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