> Dear list, > > Today I got a support ticket claiming that some mail was not arriving in > a persons mailbox. > > Sure enough when I went trough all our postfix and cyrus logs I could > see that the email was certainly delivered to our mail store. > > It was the duplicate delivery that eliminated duplicate message. > > When I grepped in the mailbox after that message id I could find an > other totally different message with the same id. > > The only thing that both message had in common was that they were both > created with Microsoft Outlook 12 and 11. > > I thought that the message-id should be unique. Outlook is broken, it sends new mails with existing message-id under certain circumstances (for example when resending an already sent mail to other receivers). Microsoft has fixed this - in their MTA on exchange! No joke, when sending mail from Outlook to Exchange via SMTP the Exchange server will always regenerate a uniq message-id. I don't have a fix, only an explanation. Simon > > Has any body seen this before? > > I couldn't find any info on the net how it is generated by Outlook. > Maybe it is a setting that can be changed? > > Thanks in advance, > > > -- > -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- > Rudy Gevaert Rudy.Gevaert@xxxxxxxx tel:+32 9 264 4734 > Directie ICT, afd. Infrastructuur ICT Department, Infrastructure office > Groep Systemen Systems group > Universiteit Gent Ghent University > Krijgslaan 281, gebouw S9, 9000 Gent, Belgie www.UGent.be > -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- > ---- > Cyrus Home Page: http://cyrusimap.web.cmu.edu/ > Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki > List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html > ---- Cyrus Home Page: http://cyrusimap.web.cmu.edu/ Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
