Issue Postfix: duplicated email received

[Matteo Cherubin]

Hello, I've a installation of plesk v17.8.11 in CentOS server. I've a problem with the email of a domain, the mailboxes recieve dozens of duplicated emails. I don't find documentation of this problems.

Can someone help me?

Thanks

 

[IgorG]

First of all, try to fix email settings with

# plesk repair mail

 

[Matteo Cherubin]

Thanks for your reply, but I tryed this way 3 day ago, but the problem still remain

 

[IgorG]

Is this your case - mail is sent to multiple mailboxes with forwarding to a user@domain.tld and delivered to user@domain.tld multiple times?

 

[Monty]

Hello, I've a installation of plesk v17.8.11 in CentOS server. I've a problem with the email of a domain, the mailboxes recieve dozens of duplicated emails. I don't find documentation of this problems.

Compare the headers of 2 duplicate mails and check for:
- Same message-id for both mails?
- Postfix queue-id of the mails?
- "Received:" headers

Then search for the Postfix queue-id of both mails in your mail log files. If unsure, post headers + logs here (anonymized). As @IgorG said it's most likely a mail that was sent to multiple recipients with forwarding or copyto another recipient.

For example:
- Mail was sent to userA@domain.tld and userB@domain.tld
- userA@domain.tld has a forward to userB@domain.tld
- userB@domain.tld will now have 2 copies of the mail in his inbox

 

[Matteo Cherubin]

No the mail are not forwarded

 

[Monty]

Compare the headers of 2 duplicate mails and check for:
- Same message-id for both mails?
- Postfix queue-id of the mails?
- "Received:" headers

Then search for the Postfix queue-id of both mails in your mail log files. If unsure, post headers + logs here (anonymized).

And what about this?

 

[Matteo Cherubin]

Yes Same message-id, postfix and received

 

[Monty]

And what do you see if you grep for the postfix queue-id in your maillogs?

 

[Matteo Cherubin]

If I try the command "postcat -q XXXXXXXXXXX" I see only a message

 

[ChristophRo]

If you see the same postfix id, then these emails got duplicated by either a server-side rule (created in roundcube/horde) or a desktop mail client using client-side rules.

You're client is using IMAP?
If yes, you may also wanna inspect the raw mail files under /var/qmail/mailnames/ on your server and check/compare the content of these mails/files as well as timestamp of them.