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I have problems with mails sent being vanished. I have sent 3 mails from domain2 to domain1 at Dec 17 19:06:xx I see them vanished. I have sent three mails from Srinivas_Vinnkota@domain2 to rajesh_kodali@domain1 and I got only 1 to the mail inbox. same again at 19:20:xx I sent two mails and got only one mail. I could not understand what must have happened.
You more than likely have a filter that's discarding email or you have a client connected with POP3 to the server, POP3 will remove mail from the server. Check whether either of those is true. If you have a problem post the portions of your log file around the time of the incident not the whole file.
I use zimbra desktop as zimbra client and I am surprised to see all the logs telling that the mails reached the server but I don't see lmtp delivery log for some mails. Second thing I have disabled Anti-spam so I don't think the mail is sent for Anti-spam clean too. when I send from gmail I get mails. but they get miss from domain2 very strange indeed
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Problems with mails sent from domain 
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