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Mailbox problem

Discussion in 'E-mail Discussions' started by krembo99, Jul 25, 2014.

  1. krembo99

    krembo99 Member

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    Hello All,

    Today I have encountered a very strange problem in mail settings via Cpanel.

    I have set up a new mail address [ jobs@domain.com ] , and set up also 2 forwarders for that account .
    I also accesses the webmail to be sure it exists and in fact - I even successfully sent outgoing mail from that address.

    This is a normal procedure that I have done many times before...
    This time though, something really strange came up.

    When I am sending mail to that account [ jobs@domain.com ] , I get a

    Code:
     550 "Unknown User"
    mail back ( from postmaster ) but the strangest part is - that at the same moment, I also get the forwarded mail to the correct forwarded address .

    My question is - how is it possible that the server return
    Code:
     550 "Unknown User"
    and at the same time knows to manage the forwarding of a supposedly non existing account ?? - What can be the problem ? and how to fix it ? ( I assume that some will suggest to delete the account and set up a new one - but that would not really help to find the CAUSE for such a problem or to ensure it does not happen again .. )
     
  2. cPanelMichael

    cPanelMichael Forums Analyst
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    Hello :)

    Have you ensured the domain name resolves to your server and it's MX records are correct? What entry do you see in /var/log/exim_mainlog when this happens?

    Thank you.
     
  3. krembo99

    krembo99 Member

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    Thank you for your reply.

    Right now , I do not have access to the server , But as for the MX recods for the domain - I assume that they are correct because I have about 40 other accounts on that same domain that works just fine .
     
  4. krembo99

    krembo99 Member

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    I have now accessed the server , and as per your suggestion, the /var/log/exim_mainlog has the following :

    Code:
    2014-07-27 03:46:02 pid 3023: SIGHUP received: re-exec daemon
    2014-07-27 03:46:02 cwd=/var/spool/exim 3 args: /usr/sbin/exim -bd -q1h
    2014-07-27 03:46:02 exim 4.82 daemon started: pid=3023, -q1h, listening for SMTP on port 25 (IPv6 and IPv4) port 587 (IPv6 and IPv4) and for SMTPS on port 465 (IPv6 and IPv4)
    2014-07-27 03:46:02 cwd=/var/spool/exim 2 args: /usr/sbin/exim -q
    2014-07-27 03:46:02 Start queue run: pid=28580
    2014-07-27 03:46:02 1XAu5t-0004bj-Ko Message is frozen
    2014-07-27 03:46:02 1XAu6t-0004fa-06 Message is frozen
    2014-07-27 03:46:02 1XAu6t-0004fi-Gm Message is frozen
    2014-07-27 03:46:02 1XAu6t-0004ft-Ru Message is frozen
    2014-07-27 03:46:02 1XAu5t-0004be-E2 Message is frozen
    2014-07-27 03:46:02 1XAu6t-0004fq-Ps Message is frozen
    2014-07-27 03:46:02 1XAu6t-0004fm-N0 Message is frozen
    2014-07-27 03:46:02 1XAu5v-0004cX-2Q Message is frozen
    2014-07-27 03:46:02 1XAu5v-0004cf-OI Message is frozen
    2014-07-27 03:46:02 1XAu5v-0004ch-Pb Message is frozen
    2014-07-27 03:46:02 1XAxqK-00075q-SS Message is frozen
    2014-07-27 03:46:02 1XAxqK-00075a-D6 Message is frozen
    
    ...... many more just the same ....
    I have also tried and verified that the same problem exists also for NEW mailboxes on the same domain [ Old mailboxes work as expected ..]

    What I have learned about the situation so far :

    1 . The mailbox exists and is configured correctly .
    2 . One can access the webmail inbox.
    3 . One can successfully send outgoing mail from said webmail
    4 . One can NOT login using a regular mail client [ Tried Mozilla thunderbird , Android Clients, iPhone Clients - All with normal pop/smtp/imap ports AND ssl ..] - The error is [ "Authentication failed" ]
    5 . One can NOT send mails to said account , the immediate reply is [ 550 "Unknown User" ]
    6 . One can successfully send outgoing mail using this mailbox with regular mail client but with different SMTP account on same domain ( info@mydomain.com )

    What I have tried so far ( in no particular order ):

    1 . In WHM -> Restart all mail related services , as well as a graceful server reboot.
    2 . In WHM -> Mail Delivery Report -> Report inquiery for mailbox with [ no records found result ]
    3. In WHM -> Mail troubleshooter - No problems found
    4. In WHM -> Repair mailbox permissions - NADA
    5. In WHM -> MX entry - Verified Routing for mydomain.com - Local mail exchanger, TTL 14400, priority 0 domain mydomain.com
    6. In WHM -> Mail Queue manager - some "frozen" but none has to do with the specific problematic mailbox .
    7. In Cpanel -> Verified MX entry
    8 . In Cpanel -> DELETED all forwarders for the specific mailbox and eventually for the WHOLE DOMAIN .
    9 . In Cpanel -> DELETED the whole mailbox and created [ several ] New one.
    10 . In Cpanel -> Mail authentication -> DKIM I tried both enabled AND disabled
    11 . In Cpanel -> SpamAssassin AND boxtrapper are currently disabled.
    12 . No quota problems, mail or disk or otherwise.

    None of the above helped ...

    This problem is becoming urgent , And I am really at the dark here ...
     
    #4 krembo99, Jul 26, 2014
    Last edited: Jul 27, 2014
  5. cPanelMichael

    cPanelMichael Forums Analyst
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    For instance, when I reference /var/log/exim_mainlog, I mean to search it for the email account in question. EX:

    Code:
    exigrep user@domain /var/log/exim_mainlog
    Thank you.
     
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