Ask Ubuntu is a question and answer site for Ubuntu users and developers. It's 100% free.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

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


share|improve this question
Could you tell me what would cause this? sendmail.postfix: fatal: No recipient addresses found in message header – user402388 Apr 27 '15 at 15:22
up vote 11 down vote accepted

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.

share|improve this answer
Hi, thanks for your help. I have follow your instruction, but still getting the same error =========================================================== Jul 11 19:10:59 victoria postfix/master[15150]: fatal: bind port 25: Address already in use Jul 11 19:11:48 victoria postfix/master[15432]: fatal: bind port 25: Address already in use Jul 11 19:11:49 victoria postfix/master[15431]: fatal: daemon initialization failure Jul 11 19:11:50 victoria postfix/postfix-script[15433]: fatal: mail system startup failed Any idea? maybe is not the sendmail this time? – Chock CHin Li Jul 11 '13 at 11:12
@ChockCHinLi Added a bit to the end to help you work out what's going on. – Oli Jul 11 '13 at 11:38
hey, thanks for your help. I restart my server and the postfix is started and no more error from the log! Thanks! – Chock CHin Li Jul 11 '13 at 12:07

For me the solituion was a variant of Oli answer in an Ubuntu13:

Error: fatal: bind port 25: Address already in use

Sendmail purge didn't work:

Package 'sendmail' is not installed, so not removed

So I tried:

service sendmail stop
sudo apt-get install --reinstall postfix

and worked!

share|improve this answer
sudo service postfix stop did the trick for me. Then a sudo /etc/init.d/postfix reload succeeded. – danger89 Jun 12 '14 at 21:08

This solved me on the same issue.

service sendmail stop
service postfix restart
service sendmail start

As seen at Postfix start error Port 25: Address already in use

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.