> Date: Wednesday, February 17, 2016 17:40:44 -0500 > From: kazabe <kaz...@gmail.com> > > hi. > > i some users are reporting me to they are receiving many copies of > the same message. the remitent just send 1 message and the > recipient receipt 7 or more copies of the same message. > > we check the send mail folder in the remitent (outlook 2010) and > just have the message sended 1 time. > > the copies received in the destination folder have aprox 4 or 6 > mins between them. > > can be a client sender problem? how can i verify that? > > thanks and regards.
In my experience this generally results from two mail servers along the path not communicating well. The first server doesn't get the ACK from the second so requeues/retries the message, while the second thinks all is well and sends the message on. Assuming that that's the case, a way to figure out the offending pair is to look at the headers of two (or more) of these messages (received by the same recipient). Read the lines from the bottom up. Where the lines diverge is where the machines aren't closing out their transfer communication properly. If these machines are under your control, look at the logs to see what is going on. If they aren't, then track down their administrator(s).
