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E-Mails being received again on a Postfix POP account

Hello,

So far this pertains to only one user.  They are receiving messages that was received on 12/5/13 & 1/23/14.  He is using Outlook (2010) & not saving e-mails on the server.

Is there a possibility that messages get "stuck " somewhere in Postfix?  If so, where and how do I fix it?

The Linux server is Ubuntu 13.04, Postfix 2.10

Thanks for your help in advance.

Have a great weekend,

Don
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GEMCC
Asked:
GEMCC
1 Solution
 
Dan CraciunIT ConsultantCommented:
Check your postfix configuration for mail location (default is /var/mail/user-name, if I remember correctly) then ls that folder to see if you have undelivered mails there.

My guess would be that the sender's server is resending emails.

HTH,
Dan
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GEMCCAuthor Commented:
HI Dan,

Thanks for the tip.  Actually, the path on my server is /var/vmail/... Nothing is listed there.

I was thinking that maybe the sender's server might be the issue also, however, they are coming from 3 locations: comcast.net, msn.com & yahoo.com.  He has received the same yahoo.com message 5 times.

Any other thoughts?
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Dan CraciunIT ConsultantCommented:
Check the mail logs (mail and mail.err, possibly mail.debug) for that particular message.

It's possible your server did not confirm yahoo's server that it received the email, so the remote server did it's job and resent it.

PS: don't know the exact names for postfix logs. I use exim.
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comfortjeaniusCommented:
Are use that is the right location /var/vmail????

Postfix sends all log messages to /var/log/mail.log. However error and warning messages can sometimes get lost in the normal log output so they are also logged to /var/log/mail.err and /var/log/mail.warn respectively.

You can check this documentation and scroll down to the troubleshooting section: "Postfix"
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GEMCCAuthor Commented:
Yes, /var/vmail/domainname/user.  I am also using ISPConfig.

I am looking at mail.log, but do not know what to look for.

Please advise.
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Jan SpringerCommented:
turn on detailed headers and look at the SMTP IDs.  

if they are all unique, then the sender or sending server is the problem.

if there is a duplicate, then the server associated with the duplicate ID is the problem.
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GEMCCAuthor Commented:
It appears that the spam filter (Xeams) was causing the problem.  Reduced the number of days Xeams stores messages.  User no longer getting repeat messages.
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GEMCCAuthor Commented:
Resolved issue
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