Usually grey list delays will only happen on somebody's first email. I don't kow the history behind the emails those headers were attached to, but my bet would be that the first is a known poster while the second is a first-time poster.
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<div><span class="gmail_quote">On 1/15/07, <b class="gmail_sendername">Steve Siegfried</b> <<a href="mailto:sos@zjod.net">sos@zjod.net</a>> wrote:</span>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid"><br>Hey, what's the deal with TCLUG email headers like:<br> > X-Greylist: domain auto-whitelisted by
SQLgrey-1.7.4<br>and<br> > X-Greylist: delayed 00:05:08 by SQLgrey-1.7.4<br><br>Seems like some of the folks posting here are more equal than others.<br><br>-S<br><br>_______________________________________________
<br>TCLUG Mailing List - Minneapolis/St. Paul, Minnesota<br><a href="mailto:tclug-list@mn-linux.org">tclug-list@mn-linux.org</a><br><a href="http://mailman.mn-linux.org/mailman/listinfo/tclug-list">http://mailman.mn-linux.org/mailman/listinfo/tclug-list
</a><br></blockquote></div><br>