I've been getting duplicate messages since a recent power failure.  Thanks to a UPS, I shut down the mail server and mirror cleanly, so no crash.  It's only certain senders that seem to generate duplicates.  I've received five copies of some messages.

Any ideas what could be causing this?

Currently running version 7.3o4-4 on a Centos system.

-- 
John Wilkes
john@wilkes.com