As Mike says, look at the Privacy options. SquirrelMail is exceptionally well-behaved (I use it myself and recommend it) so I am surprised to see its mails rejected. However, because it is web based and (in the default configuration) runs sendmail to send messages, there is one header you might well see:
X-Authentication-Warning: sample.com: apache set sender to [EMAIL PROTECTED] using -f and I suppose someone might be filtering for that. ------------------------------------------------------ Mailman-Users mailing list [EMAIL PROTECTED] http://mail.python.org/mailman/listinfo/mailman-users Mailman FAQ: http://www.python.org/cgi-bin/faqw-mm.py