We are running zimbra oss (3.1 suse 10) in production for two weeks now and I encountered two reported corrupt emails. One email came blank with the real email being attached (with document attachment) and the other came with ghost attachments (one attachment being ok).
First thing I suspect is the clam and amavis although I did not had problems with them before. Our isp is the domain forwarder for the domain and they are running clam in smtp so that can be a suspect as well. Third, lease line droped briefly in that period.
Did anyone else had similar problems, especially in large environments (ours is 250) ??