I have a client using SBS 2008 which includes Exchange 2007 and one of the client's employees sent out an email last February and the employee just found out last week that the recipients have been receiving this email multiple times since then.
Other than the possibility of the employee's Outbox having this email in it, what other possibilities could be causing this?
The issue seems to be linked to the "server timeout" value on the sender's copy of Outlook -- and a bug in the Outlook resend function. Anything that delays the send process can trip the limit, e.g. emails that have large file attachments, a slow wireless
connection, slow email server response, and delays caused by antivirus scans.
If this problem is being repeat then the best solution appears to be to increase the server timeout value in Outlook to 5+ minutes if you have a fast connection, or more if the connection and throughput are slower. (Select the main email account and
pick edit/change, then "More Settings" then the "Advanced" tab.)
I hope this will help !
Proposed as answer byAnil K SinghSunday, May 02, 2010 4:37 AM
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