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Mail was accidentally installed on my debian server and I want to remove all mta, mail related software. I do not know what exactly was installed, how can I find out and uninstall this stuff? I don't want to see this "you have mail" when I log in.

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Start with

dpkg --get-selections


dpkg --get-selections | grep -v deinstall

for a shorter list, which shows you what is installed. Look through the list, work out the major packages you don't need (like exim, postfix, mailx, bsd-mailx, etc.) and then,

apt-get remove exim mailx ......
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Do you see any mail related packages in this list? – powtac Jun 7 '12 at 15:05
I still get "You have mail" :-( – powtac Jun 7 '12 at 15:14
That's probably because you have content in /var/spool/mail/userid. If you don't care about mail, just delete your file from there. – EightBitTony Jun 7 '12 at 15:50

I'm assuming you're using postfix since it's the default mail server for Debian (I think). You should be able to remove this by using:

apt-get remove postfix

If it's not the postfix package just substitute the name of the package that was installed.

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My bad, postfix is the mail server, sub mutt for postfix (is the default mail client on most of the distro's I have seen). – Rob Jun 7 '12 at 14:39

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