Is it only one user? Is it internal to the mail system or is it sending out to the Internet?
I ran into this one at a client site recently, turned out to be a faulty hub. Something in the network is causing a delay, resulting in a message file being processed twice, three times; I've seen it reprocess a message file 10 times.
Anti-Virus software can also cause this. Exclude the domain and po directories. You can't scan the database files for virus anyway; you should have a scanner on the SMTP directories though.
Brent SchmidtCNE,Network +
Senior Network Engineer Keep IT Simple
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