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Mail delivery failed: returning message to sender. Unable to Send emails but receving is fine.

Comments

2 comments

  • Damian

    Your hosting provider will need to look specifically at the mail logs because what you see in Roundcube does not provide enough details.

    The mail logs will show an explanatory message along with the specific error code.

    You need your provider to do this unless you have root access.

    1
  • cPRex Jurassic Moderator

    This sounds like a DNS issue.  Are you able to run the following command from your system and get a response from the mailserver?

    telnet gmail-smtp-in.l.google.com 25
    0

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