This is answered in the FAQ: http://www.lsoft.com/manuals/lsv-faq.stm#2.12 Briefly, someone tried to send a mail-merge message, and you aren't running LSMTP Classic as your outbound mailer program, so the proprietary SMTP extensions used for LISTSERV's mail-merge feature aren't supported. Nathan At 11:27 AM 7/23/2003 -0400, Dave wrote: >Some users have reported they haven't been receiving LISTSERV messages, >despite the fact that I have run several successful tests. > >I looked into the issue and found that there is an infinite loop going >on somewhere. The SMTPS log file repeats the following 3 commands every >second: > >23 Jul 2003 00:00:01 *** LSMTP extensions activated *** > >23 Jul 2003 00:00:01 -> XDFN="John Smith" > >23 Jul 2003 00:00:01 500 Syntax error, command unrecognized > >This has apparently been going on for months. > >It seems that someone might have sent a DISTRIBUTE job with a syntax >error. Still, I don't see why it should lead to this behavior. > >I've searched the spool directories and took a look at LSMTP but can't >find any trace of this problem, nor can I figure out how to stop it. I >don't know if it's related to the lost mail, but it's definitely a >problem. Any help would be appreciated. > >-- >Dave Rubin