On Wed, Nov 12, 2008 at 5:16 PM, Gilbert E. Detillieux <span dir="ltr">&lt;<a href="mailto:gedetil@cs.umanitoba.ca">gedetil@cs.umanitoba.ca</a>&gt;</span> wrote:<br><div class="gmail_quote"><div>&nbsp;</div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
 &gt; 451 4.5.0 SMTP protocol violation see RFC 2821<br>
<br>
Usually, an error message like that would suggest something is messed up<br>
in the MTA configuration at one end or the other. &nbsp;Did you bother to<br>
check this site for likely possibilities?...<br>
<br>
<a href="http://www.rfc-ignorant.org/rfcs/rfc2821.php" target="_blank">http://www.rfc-ignorant.org/rfcs/rfc2821.php</a><br>
</blockquote></div><br>Which one of the 79 pages do you suggest he starts with, Gilbert? <br><br>While you&#39;re mulling that over, I&#39;ll suggest something more helpful:<br><br><a href="http://forums.devshed.com/mail-server-help-111/gmail-responds-451-4-5-0-smtp-protocol-violation-568574.html">http://forums.devshed.com/mail-server-help-111/gmail-responds-451-4-5-0-smtp-protocol-violation-568574.html</a><br>
<br>Google&#39;s the one at fault here, the thread has a workaround from the postfix mailing list, and seems to have fixed the problem permanently.<br><br>Sean<br clear="all"><br>-- <br>Sean Walberg &lt;<a href="mailto:sean@ertw.com">sean@ertw.com</a>&gt; &nbsp; &nbsp;<a href="http://ertw.com/">http://ertw.com/</a><br>