Hey All, I'm still getting lots, and lots or error 451's in my smtp-failures log. The errors look like this: Mailman.pythonlib.smtplib.SMTPDataError / (451, '4.4.1 timeout waiting for input during message collect') (dequeued) Its running on BSD/OS 4.1 with mailman 1.1 and sendmail 8.10.0 Cheers, Christine