email problem

Discussion in 'ISPConfig 3 Priority Support' started by Tom John, Jul 28, 2020.

  1. Tom John

    Tom John Member HowtoForge Supporter

    HI guys,
    i am running ubuntu 18.04 and ISPConfig 3.1
    I have a problem with 1 email account from 1 Domain only and i get the following error:
    Jul 28 22:44:00 server4 postfix/smtpd[326]: NOQUEUE: reject: RCPT from[]: 451 4.3.5 <[email protected]>: Recipient address rejected: Server configuration problem; from=<[email protected]> to=<[email protected]> proto=ESMTP helo=<>
    Do you have any idea what can the problem be? the other emails seem to work well.

    thanks a lot for your help
    Last edited by a moderator: Jul 29, 2020
  2. Taleman

    Taleman Well-Known Member HowtoForge Supporter

    That infoaddress seems to be wrong somehow. Compare how it is set up differently to the other working e-mail boxes.
    The e-mail setup tutorial linked to in my signature tells a bit on how to debug e-mail problems.
  3. till

    till Super Moderator Staff Member ISPConfig Developer

    The issue is at the [email protected] address, if I understand it right then you don't host that info address? In this case, there is nothing that you can do as its a problem on the recipient's side.
  4. Tom John

    Tom John Member HowtoForge Supporter

    Thanks a lot for your kind help.
    I host the [email protected] address and i found a solution in delete the email with ispconfig and then set up the email again, now everything is working.

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