Issue Email forward to wrong domain, even when good one is given in the mail adress

[AmaZili Communication]

Hi,

Running centos7.2 plesk 12.5, we have an issue on one domain email system acting strangely.

This domain is mydomain.com.
There is also a mydomain.fr which emails are handled through Google Apps.
The domain.fr is declared as an alias domain for thedomain.com in the panel
The email adresses on the .com have corresponding names on .fr domain.
The emails from .com were forwarded to the .fr equivalent adress.
No mailbox hosting defined on the .com adresses, just forwarding.

Everything was running smoothly for years now.
A few days ago we started to have troubles with emails.
When we tried to send emails from a domain hosted on the same server using an outlook client to a user@mydomain.com, it got returned with the message :

I'm sorry to have to inform you that your message could not be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can delete your own text from the attached returned message.

                   The mail system

<user@domain.com> (expanded from
    <user@domain.fr>): mail forwarding loop for
    user@domain.com

and in the message log file we get :

Oct 11 15:48:27 serveur postfix/pipe[21471]: 40BBDB40165: to=<user@mydomain.com>, orig_to=<user@mydomain.fr>, relay=plesk_virtual, delay=0.1, delays=0.06/0/0/0.04, dsn=5.4.6, status=bounced (mail forwarding loop for user@mydomain.com)

We tried to disable mail service on the .fr domain alias plesk panel hosting.
Destroyed the alias hosting.
Plesk repair mail

It's only getting worse with the effect that now even when we send to the .fr adress, it get rejected :

I'm sorry to have to inform you that your message could not be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can delete your own text from the attached returned message.

                   The mail system

<user@mydomain.com> (expanded from
    <user@mydomain.fr>): mail for mydomain.com loops
    back to myself

When we send email from another domain not hosted on the same server, it works fine for the user@domain.fr.

Can someone help on this ?

Thanks

 

[Bitpalast]

Check all redirect settings/mail forwarding settings of the accounts in question. Somewhere the recipient is redirecting back to the sender and the sender is redirecting it to the recipient.

 

[AmaZili Communication]

Thanks Peter.

First thing, this was working fine for years and nothing has been changed.
Second, domain in .fr never redirect to anything.

This is a real issue, not just misconfiguration

 

[AmaZili Communication]

a little up !

 

[Alex@Plesk]

Hello,

https://kb.plesk.com/en/127097
https://kb.plesk.com/en/128597
https://kb.plesk.com/en/128807
https://kb.plesk.com/en/125197
https://kb.plesk.com/en/121745

It may be useful.

 

[AmaZili Communication]

Thanks Alex for your help,

I tried all of them.

None solved the problem.
Some commands seems not to apply.

Hereunder are the commands and results from all of the above links you mentionned ( I have change the real domain name to domain and resl address to 1.1.1.1 ) :

/usr/local/psa/bin/domain -u domain.fr -mail_service false

Unable to find domain with name 'domain.fr'

host domain.com
domain.com has address 1.1.1.1
domain.com mail is handled by 10 mx1.domain.com.

host domain.fr
domain.fr has address 1.1.1.1
domain.fr mail is handled by 5 alt1.aspmx.l.google.com.
domain.fr mail is handled by 5 alt2.aspmx.l.google.com.
domain.fr mail is handled by 10 aspmx4.googlemail.com.
domain.fr mail is handled by 1 aspmx.l.google.com.
domain.fr mail is handled by 10 aspmx2.googlemail.com.
domain.fr mail is handled by 1 aspmx3.googlemail.com.
domain.fr mail is handled by 10 aspmx5.googlemail.com.

ifconfig | grep  1.1.1.1
        inet 1.1.1.1  netmask 255.255.255.255  broadcast 1.1.1.1

cat: /etc/sysconfig/network-scripts/ifcfg-eth0-range0
        cat: /etc/sysconfig/network-scripts/ifcfg-eth0-range0: Aucun fichier ou dossier de ce type

cat /var/qmail/mailnames/domain.com/info/.qmail

cat: /var/qmail/mailnames/domain.com/info/.qmail: Aucun fichier ou dossier de ce type

ls -la /var/qmail/mailnames/

drwxr-x--- 16 popuser popuser 4096 12 oct.  14:41 domain.com
Nothing for the domain.fr

find  /var/qmail/mailnames/ -type l
the command returns nothing

ls -la /usr/sbin/sendmail

lrwxrwxrwx 1 root root 21 11 oct.  17:38 /usr/sbin/sendmail -> /etc/alternatives/mta

This is a real clue !