Diagnostic-Code: smtp; 553 sorry, that domain isn't in my list of allowed

Discussion in 'General' started by dynamind, Dec 17, 2013.

  1. dynamind

    dynamind Member

    Hi,

    a client told me he istn't able to succesfully send some emails, he get's the following error in detail:

    does it mean he's blocked on the receiver's side?

    best regards
     
  2. till

    till Super Moderator Staff Member ISPConfig Developer

    Yes, he is most likely blocked by the receiver.
     

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