On Thu, Dec 27, 2018 at 05:19:16AM +0100, Wesley van Synio wrote: > Because of the SRS becoming lowercase, ...
> Output of postconf -n:* (I replaced my real domain name with MYDOMAIN)* > > recipient_canonical_maps = tcp:localhost:10002 > sender_canonical_classes = envelope_sender > sender_canonical_maps = tcp:localhost:10001 > smtpd_milters = inet:localhost:8891, > local:/var/run/milter-greylist/milter-greylist.sock > virtual_alias_maps = hash:/etc/postfix/virtual, > regexp:/etc/postfix/virtual-regex The above are the places to look for unwanted case-folding. The first and last only affect recipient addresses, so not your immediate problem, but likely still worth a look for similar issues. -- Viktor.