Question

22

Problem using Postfix with Sendmail

rated 0 times [ 22] [ 0] / answers: 1 / hits: 43686 / 2 Years ago, sat, april 23, 2022, 4:50:18

I've sendmail installed using "apt-get install sendmail" and also postfix installed using Webmin. But Postfix cannot start, and when I checked the /var/log/mail.err

*Jul 11 14:09:03 victoria postfix/master[6588]: fatal: bind 0.0.0.0 port 25: Address already in use

Jul 11 14:09:10 victoria postfix/master[6821]: fatal: bind 0.0.0.0 port 25: Address already in use

Jul 11 14:09:11 victoria postfix/master[6820]: fatal: daemon initialization failure

Jul 11 14:09:12 victoria postfix/postfix-script[6822]: fatal: mail system startup failed*

and my "netstat -tap" show:

*root@victoria:/etc/init.d# netstat -tap

Active Internet connections (servers and established)

Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name

tcp        0      0 localhost:mysql         *:*                     LISTEN      2365/mysqld     

tcp        0      0 localhost:submission    *:*                     LISTEN      5639/sendmail: MTA:

tcp        0      0 *:webmin                *:*                     LISTEN      896/perl        

tcp        0      0 *:ssh                   *:*                     LISTEN      554/sshd        

tcp        0      0 localhost:smtp          *:*                     LISTEN      5639/sendmail: MTA:

tcp        0    384 192.241.205.208:ssh     175.139.222.195:45062   ESTABLISHED 29460/1         

tcp6       0      0 [::]:http               [::]:*                  LISTEN      773/apache2     

tcp6       0      0 [::]:ssh                [::]:*                  LISTEN      554/sshd        

getnameinfo failed

getnameinfo failed

tcp6       0      1 [UNKNOWN]:http          [UNKNOWN]:60003         LAST_ACK    -*

disable Sendmail can get the Postfix up and running. But I thought sendmail and postfix are suppose to work together? How to configure to have them both in a server?

Thanks.

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answered 2 Years ago tudatchful · Accepted Answer

Postfix is a drop-in sendmail replacement that includes its own sendmail binary (see the foot of this post). I'm honestly surprised apt let you do this, I thought they were package conflicted.

Anyway, to fix:

sudo apt-get purge sendmail

sudo apt-get install --reinstall postfix

sudo /etc/init.d/postfix restart

Proof that sendmail on my system is provided by postfix:

$ dpkg -S `which sendmail`

postfix: /usr/sbin/sendmail

If you're still having problems, here's how you can find out what program (and which package) is hogging port 25:

$ sudo netstat -pel | grep smtp

tcp 0 0 *:smtp *:* LISTEN root 8487 2212/master



$ # Then we use the 2212 from that in the following to get the package:

$ dpkg -S "$(sudo ps ux | grep 2212 | awk '{print $NF}')"

postfix: /usr/lib/postfix/master

In my case that's postfix. In your case I expect to see something else. Nuke it from orbit.