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<TD style="COLOR: black; FONT: 9pt Tahoma; WIDTH: 200px"><B>Spectrum
Computer Solutions</B><BR>331 Ansty Road<BR>Wyken<BR>Coventry<BR>CV2
3FN<BR></TD>
<TD style="FONT: 9pt Tahoma"><B style="FONT-FAMILY: Courier New">T.</B>
07980 861013<BR><B style="FONT-FAMILY: Courier New">F.</B> 02476
619383<BR><A href="www.spectrumcs.net">www.spectrumcs.net</A><BR><A
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<DIV># uname -a<BR>FreeBSD crimson.spectrumcs.net 9.1-RELEASE-p4 FreeBSD
9.1-RELEASE-p4 #0: Mon Jun 17 11:42:37 UTC 2013</DIV>
<DIV><BR># amavisd -V<BR>amavisd-new-2.8.0 (20120630)</DIV>
<DIV><BR># perl -V<BR>Summary of my perl5 (revision 5 version 14 subversion 4)
configuration:<BR> </DIV>
<DIV>Hi all,</DIV>
<DIV> </DIV>
<DIV>Over the past few months I've been receiving a lot of requests from staff
to release email which has been marked as [INVALID HEADER] due to 'Duplicate
header field: "MIME-Version"'.</DIV>
<DIV> </DIV>
<DIV>When I take a look at the messages I see they're read receipts relating to
an email a staff member has sent. (the subject has a READ: prefix).</DIV>
<DIV> </DIV>
<DIV>The examples I can remember have been from large financial
institutions in the UK so getting though to their IT department is unlikely from
my position as a SMB IT Support person.</DIV>
<DIV> </DIV>
<DIV>A censored example is available at <A
href="http://pastebin.com/1qXP5suv">http://pastebin.com/1qXP5suv</A></DIV>
<DIV> </DIV>
<DIV>To my untrained eye I believe there are too many MIME-Version: 1.0 headers
(lines 33 and 50) but I'm unsure if this is a problem specific to this group of
senders or a wider problem. I can see from the headers that the senders
organisation is using a exchange server but I can't tell what version (perhaps a
incompatibility with the latest version?). Is anyone else having similar
problems?</DIV>
<DIV> </DIV>
<DIV>Also, is it possible to somehow prevent Amavisd sending notifications for
'Duplicate header field' against only "MIME-Version"' (eg, I still
want 'Duplicate header field: "Subject"' notifications) and what would be the
implications? Could anything malicious sneak though?</DIV>
<DIV> </DIV>
<DIV>(I have full policy configuration backed by MySQL database)</DIV>
<DIV> </DIV>
<DIV>Regards</DIV>
<DIV style="FONT-WEIGHT: bold; COLOR: black; PADDING-TOP: 10px; Tahoma: ">Stephen Scotter</DIV>
<DIV>Systems Consultant</DIV>
<DIV>T. +44 (0) 7970 463925</DIV><BR>
<DIV><STRONG><U>
<DIV> </DIV>
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