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The email message could not be delivered because of an unknown issue

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10 comments

  • rpvw
    4.0.0 Email Bounce Error: Delayed Message: Unknown issue The email message could not be delivered because of an unknown issue. Fixes
    • Check the recipient's email for misspellings or missing letters.
    • Check your mail logs for any hints as to why the delivery failed on previous delivery attempts
    [quote]4.0.0: Official Definition [RFC3463] (Standards Track) from the The Internet Engineering Task Force (IETF) definition for codes that start with 4.X.X: A persistent transient failure is one in which the message as sent is valid, but persistence of some temporary condition has caused abandonment or delay of attempts to send the message. If this code accompanies a delivery failure report, sending in the future may be successful. [RFC3463] (Standards Track) from the The Internet Engineering Task Force (IETF) definition for codes that end with X.0.0: Other undefined status is the only undefined error code. It should be used for all errors for which only the class of the error is known.
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  • cPanelLauren
    The advice provided here by @rpvw is on point, it would seem there's an issue with the email address. If you have root access to the server checking the exim logs may provide some insight to what happened. You can find the exim logs here: /var/log/exim_mainlog
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  • knightmare
    Hello, This is error, 1go6kY-0008O4-Oj == (mail-id) routing defer (-51): retry time not reached
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  • rpvw
    The error you posted does not tell us what the original reason for the delivery failure was. It only tells us that the retry time has not been reached to try again. The post below should help you:
    Can you try to see if you can connect to the port 25 of remote mail server from the server itself ? dig mx domain.com (the domain name is the domain of email account failing ) to get the mail servers. Then try telnet to the mail server to see if you can connect from the server. If no, some firewall block either at your server , or at the remote server is causing the problem.

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  • knightmare
    developer@server:~$ dig mx domain.com OUTPUT :- ; <<>> DiG 9.11.3-1ubuntu1.3-Ubuntu <<>> mx domain.com ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 56922 ;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 65494 ;; QUESTION SECTION: ;domain.com. IN MX ;; ANSWER SECTION: domain.com. 599 IN MX 1 host.domain.com. domain.com. 599 IN MX 2 mail.domain.com. ;; Query time: 78 msec ;; SERVER: 127.0.0.53#53(127.0.0.53) ;; WHEN: Wed Jan 30 14:38:20 IST 2019 ;; MSG SIZE rcvd: 90 TELNET :- developer@server:~$ telnet mail.domain.com 25 Trying 111.111.111.111... Connected to domain.com. Escape character is '^]'. 220-host.domain.com ESMTP Exim 4.91 #1 Wed, 30 Jan 2019 14:42:34 +0530 220-We do not authorize the use of this system to transport unsolicited, 220 and/or bulk e-mail. quit 221 host.domain.com closing connection Connection closed by foreign host. Is this ok ?
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  • rpvw
    ; <<>> DiG 9.11.3-1ubuntu1.3-Ubuntu <<>> mx domain.com

    I didn't think that cPanel could be run off Ubuntu ? :confused: Have you tried to force the delivery from the mail queue manager ? and if so, what errors did it show ?
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  • cPanelLauren
    At this point, if you're not having the issue with any other domains, my assumption would be that there's an issue with your mail server reaching the destination mail server. It could be a number of things if they have a postmaster or help center they should be able to tell you specifically why mail is being deferred.
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  • knightmare
    I didn't think that cPanel could be run off Ubuntu ? :confused: Have you tried to force the delivery from the mail queue manager ? and if so, what errors did it show ?

    I have tested with my local system and that is Ubuntu. :D ok, tell me how to solve this error ?
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  • rpvw
    We are not terribly interested if your local system can successfully resolve the MX records of the target domain ! You need to know if your server can resolve them, and then if you can telnet to it from your server o_O
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  • cPanelLauren
    I have tested with my local system and that is Ubuntu. :D ok, tell me how to solve this error ?

    It's irrelevant, as the connection issue exists between your server and the recipient server. As I stated previously if you're not experiencing an issue sending to other domains it sounds a lot like the issue needs to be addressed at the recipient server. Thanks!
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