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The account or domain may not exist error question

Discussion in 'E-mail Discussions' started by keat63, Feb 23, 2017.

  1. keat63

    keat63 Well-Known Member

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    Code:
    2017-02-23 09:36:28 H=(example.de) [xx.xxx.xxx.xxx]:49334 sender verify fail for <someone@unknown.dom>: The mail server could not deliver mail to someone@unknown.dom.  The account or domain may not exist, they may be blacklisted, or missing the proper dns entries.
    
    2017-02-23 09:36:28 H=(example.de) [xx.xxx.xxx.xxx]:49334 F=<someone@unknown.dom> rejected RCPT <me@my-domain.co.uk>: Sender verify failed
    
    The way I'm reading this would indicate that in the second section someone@unknown.dom, has sent an email to me@my-domain.com, but I don't understand the first section, it looks as if my server has tried to send an email to someone@unknown.dom and my server failed sender verify ??
     
    #1 keat63, Feb 23, 2017
    Last edited by a moderator: Feb 23, 2017
  2. cPanelMichael

    cPanelMichael Forums Analyst
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    Hello,

    Yes, the logs show that Exim was unable to verify that "someone@unknown.dom" is a valid email address. Does "unkown.dom" exist in the /etc/localdomains file on the cPanel server? If not, can you resolve "unknown.dom" from your server? EX:

    Code:
    host unknown.dom
    Thank you.
     
  3. keat63

    keat63 Well-Known Member

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    The offending domain was supposedly example.fr.
    I tried to ping this and cannot resolve it from my PC, so I guess it doesn't exists.

    However, I don't understand this line
    Code:
    2017-02-23 09:36:28 H=(example.de) [xx.xxx.xxx.xxx]:49334 sender verify fail for <someone@eample.fr>: The mail server could not deliver mail to someone@example.fr. The account or domain may not exist, they may be blacklisted, or missing the proper dns entries. 
    
     
    #3 keat63, Feb 24, 2017
    Last edited by a moderator: Feb 24, 2017
  4. cPanelMichael

    cPanelMichael Forums Analyst
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    Hello,

    This message shows that Exim was unable to connect to the sending host to verify it exists, and thus rejected the message. You can find more details on how Exim verifies incoming messages at:

    Exim Specification - 45. Verification of incoming mail

    Thank you.
     
  5. keat63

    keat63 Well-Known Member

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    So we're saying that we didn't try to send an email to example.fr, just tried to verify it's existance (sender verify).
    If so, then the following statement is a little misleading to the untrained eye.

    'The mail server could not deliver mail to someone@example.fr.'
     
  6. cPanelMichael

    cPanelMichael Forums Analyst
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    Hello,

    You can post the full output from /var/log/exim_mainlog for the affected message and we can confirm if that's the case. EX:

    Code:
    exigrep MSGID /var/log/exim_mainlog
    Replace MSGID with the message ID associated with the message, and post the entire output.

    Thank you.
     
  7. keat63

    keat63 Well-Known Member

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    That particular message has probably been purcged from the logs now, but I have many more.
    I don't see a message ID though.
    This one is based on the IP.

    Code:
    2017-02-27 17:09:10 SMTP connection from [xxx.xxx.xxx.xxx]:2524 (TCP/IP connection count = 3)
    2017-02-27 17:09:10 no host name found for IP address xxx.xxx.xxx.xxx
    2017-02-27 17:09:31 H=(xyz.com) [xxx.xxx.xxx.xxx]:2524 Warning: Sender rate 1.0 / 1h
    2017-02-27 17:10:08 H=(xyz.com) [xxx.xxx.xxx.xxx]:2524 sender verify fail for <kpsfm@xxx.com>: The mail server could not deliver mail to kpsfm@xxx.com.  The account or domain may not exist, they may be blacklisted, or missing the proper dns entries.
    2017-02-27 17:10:08 H=(xyz.com) [xxx.xxx.xxx.xxx]:2524 F=<kpsfm@xxx.com> rejected RCPT <me@mydomain.com>: Sender verify failed
    2017-02-27 17:10:08 H=(xyz.com) [xxx.xxx.xxx.xxx]:2524 Warning: "Detected session with all messages failed"
    2017-02-27 17:10:08 H=(xyz.com) [xxx.xxx.xxx.xxx]:2524 Warning: "Increment slow_fail_block Ratelimit - (xyz.com) [xxx.xxx.xxx.xxx]:2524 because of all messages failed"
    2017-02-27 17:10:08 SMTP connection from (xyz.com) [xxx.xxx.xxx.xxx]:2524 closed by QUIT
    [\code]
     
  8. cPanelMichael

    cPanelMichael Forums Analyst
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    Hello,

    This does appear to confirm that Exim rejected the message because it failed sender verification (the domain name does not exist). The error message is correct in that Exim could not deliver email to "kpsfm@xxx.com" to verify it exists (though it's a mock delivery). This thread is helpful for understanding the log output:

    Reading and Understanding the exim main_log

    Thank you.
     
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