My active queue keeps growing over the past 90 minutes (1410 messages at this point). qmgr is not throwing any warnings, errors, panics, etc. qshape reports domains affected as local, so appear to be incoming or local emails.
Reviewing the logs it appears that emails come into postfix and there is a huge delay before sending to amavisd. Once cleared of amavisd they are delivered promptly. master.cf: smtp-amavis unix - - n - 10 lmtp -o lmtp_data_done_timeout=1200 -o lmtp_send_xforward_command=yes -o disable_dns_lookups=yes -o max_use=20 amavisd IS configured for 10 processes and top shows them running but mostly not being used so it doesn't appear that is a bottleneck. The server is not running heavy and traffic patterns appear normal. Without any unusual reporting in the logs from qmgr and not seeing amavisd holding things up, I've reached an end of ideas. Can anyone provide me with some clues?