Ditto for me (postfix, dovecot, opendkim, spf etc), took me about 3 months to get it working, and for the last 6+ years I haven't dared to touch my postfix conf

Ditto for me (postfix, dovecot, opendkim, spf etc), took me about 3 months to get it working, and for the last 6+ years I haven't dared to touch my postfix configuration! I am severely tempted to give maddy a try now...!