emailubuntumail-server

Find out which mail server is installed on Ubuntu


I have access to a couple of Ubuntu servers and I am trying to configure the PHP mail() command for each of these servers. However, for one of these servers, the From: header is overwritten by www-data@. I have no access to the SPF record of that hostname, so I want to configure the mail server so it doesn't overwrite the From: header.

So my question is, how do I find out which mail server is used so I can correctly configure that mail server? (Postfix, SSMTP, ...)

Thanks in advance!


Solution

  • To get a list of packages installed locally do this in your terminal:

    dpkg --get-selections | grep -v deinstall
    

    To save that list to a text file called packages on your desktop do this in your terminal:

    dpkg --get-selections | grep -v deinstall > ~/Desktop/packages
    

    Then search for Mailserver. I'll do my bet for Postfix, which seems to be the most used.

    Credit goes here