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I wonder there is no mention about SRS or Postsrsd support on the forum until today. Correct me if I am wrong. Because it is very easy to make Virtualmin supporting SRS, I am posting the (Debian 8) howto:
apt-get install cmake chkconfig
postconf -e "sender_canonical_maps = tcp:127.0.0.1:10001"
postconf -e "sender_canonical_classes = envelope_sender"
postconf -e "recipient_canonical_maps = tcp:127.0.0.1:10002"
postconf -e "recipient_canonical_classes = envelope_recipient"
chkconfig postsrsd on
service postsrsd restart
rm -r /opt/postsrsd
That's all, enjoy.