I'm at my wits end trying to track down what is causing the error mentioned in the title. I have a server running Debian 11 (due for an upgrade to 13 soon.) and Postfix 3.25 which is run chrooted. Three domains are hosted, one canonical and two virtual. This was all working until a few days ago when in order to overhaul my amavis-based antispam set up which was quite a memory hog, I moved to milters. I have opendkim, open-dmarc, spamassassin, and clamav milters set up and working for sending ...
