Dovecot

There is a problem with port 143 already in use, but when you look for it nothing shows up.

It is because Dovecot is setup for ipv4 and ipv6 and default will use both, if you have ipv6 turned off it will not work.

So you have to tell Dovecot to use ipv4 only.

add this line in the Dovecot.conf

listen =*

I think?