I downloaded the 0.82 distribution, and did a diff of the prefork scripts, and made the two changes required, then restarted with debug logging.
Here's my connection from a Windows client running Thunderbird, connecting to port 587 with SSL selected, and a previously working login: running plugin (disconnect): dnsbl Plugin dnsbl, hook disconnect returned DECLINED, running plugin (post-connection): tls Plugin tls, hook post-connection returned DECLINED, running plugin (pre-connection): checksystemload Plugin checksystemload, hook pre-connection returned DECLINED, running plugin (pre-connection): limithost Plugin limithost, hook pre-connection returned DECLINED, Connection from s204-191-51-46.ab.hsia.telus.net [204.191.51.46] running plugin (connect): tls Plugin tls, hook connect returned DECLINED, running plugin (connect): connect connect plugin (connect): Port 587, IP 204.191.51.46 Plugin connect, hook connect returned DECLINED, running plugin (connect): baddns Plugin baddns, hook connect returned DECLINED, running plugin (connect): dnsbl dnsbl plugin (connect): Checking 46.51.191.204.dnsbl.sorbs.net in the background dnsbl plugin (connect): Checking 46.51.191.204.zen.spamhaus.org in the background Plugin dnsbl, hook connect returned DECLINED, 220 internal.mail.host - ESMTP dispatching =$98532/ running plugin (unrecognized_command): tls Plugin tls, hook unrecognized_command returned DECLINED, running plugin (unrecognized_command): badcmds badcmds plugin (unrecognized_command): Unrecognized Command '=$98532/' Plugin badcmds, hook unrecognized_command returned DECLINED, 500 Unrecognized command dispatching #}&<X running plugin (unrecognized_command): tls Plugin tls, hook unrecognized_command returned DECLINED, running plugin (unrecognized_command): badcmds badcmds plugin (unrecognized_command): Unrecognized Command '#}&<x badcmds plugin (unrecognized_command): Closing Connection. Too Many Unrecognized Commands Plugin badcmds, hook unrecognized_command returned DENYHARD, (204.191.51.46) Closing Connection. 2 Unrecognized Commands. Read RFC 2821 521 (204.191.51.46) Closing Connection. 2 Unrecognized Commands. Read RFC 2821 click, disconnecting I don't see AUTH in there at all. The auth plugin is listed between 'connect' and 'baddns'. I'm somewhat lost :-( I may be trying forkserver, again... J.