I've seen this when antivirus/spamassassin is run during the SMTP Session. What happens is that av/sa scan takes too long for the client, the client times out, and resends the email later. Meanwhile, the server completes it's part, and delivers the message. Then it happens again when the client retries.
Telnet in and send an email manually, see how long it takes. Obviously larger email would take even longer.
Rick
On Mon, 2007-09-10 at 12:54 -0400, dhottinger@harrisonburg.k12.va.us wrote:
I have a weird issue where several users are recieving the same
email's multiple times. Each email has a different que id, but are
exactly the same otherwise. I thought at first this was a new spam,
but I have local users doing the same thing. Im not sure where to
start looking for the root of this problem. Seems to be pretty
widespread across multiple platforms. I currently utilize openldap
for user database, sendmail, Dovecot-Imap, and horde webmail. Im not
sure where to start digging for this problem, Ive scanned through all
my log files and havent found anything. Any guidance would be great.thanks,
ddh