> Evidence, well.... > > I was forwarded one mail, where our marketing guy and somebody > external have been addressed. The marketing guy did not receive the > mail, while the other person did. > I would not try to dare asking for their server logs, since the person > which sent the mail which we did not receive is a business partner, > and it would be an unprofessional manner if I contact one of our > investors asking for their mail server logs. So all what I have is a > forwarded mail, addressed to 2 persons, and one person (which uses our > mailserver) did not receive the mail. I checked from that day on all > mail.log mail.warn and mail.err , but there is not even any hint about > this mail... > > Okay, you might say, the mail has never arrived at our server (that > was also my guess the first times when this happened). But since we > have at least 1 case per week where people wrote us, and the mail > never arrived (in addition the sender never received any error or > reject mail), I personally think it is a bit suspicious. > > I have seen emails mysteriously go missing when our antivirus scanner (ClamAV) rejected emails in which it thought it detected a Phishing attempt. I don't think the sender received a notification. There was something in the logs but it was not easily identifiable. Another case of missing emails occurs when using greylisting. Some older mailservers do not repeat emails that have been rejected, and some do not even seem to notify the sender. However there was an identifiable mention in the logs.
Ken > > 2009/3/26 Sam Varshavchik <[email protected] > <mailto:[email protected]>> > > Markus Berger writes: > > Dear all, > > I am using courier-mta and courier-imap on our server now for > a several weeks. Everything works fine so far, but as it > seems, some emails do not arrive in the mailboxes of our users. > > I got several reports, that people wrote emails to them, but > the mails never arrived. The senders did never receive any > error message in return, and mail.log / mail.err does not > state anything, if i try to search for the sender emails in > question. > > It's really strange, and i have no clue where to start, since > i have no error message and just the statement, that people > are missing mails. > > > Until more evidence is provided, more than an unsubstantiated > claim, chasing ghosts is unlikely to produce any useful results. > > ------------------------------------------------------------------------------ _______________________________________________ courier-users mailing list [email protected] Unsubscribe: https://lists.sourceforge.net/lists/listinfo/courier-users
