3 Replies Latest reply: Dec 16, 2011 12:24 AM by ajclements RSS

    #< #5.0.0 smtp; 510 Did not receive the expected protocol response.> #SMTP#

    johnnyquad

      Can anyone tell me what this actually means: #< #5.0.0 smtp; 510 Did not receive the expected protocol response.> #SMTP#

       

      I keep seeing this attached to "Delivery has failed to recipients of distribution list:" message that hits my administrator mailbox. The message is being generated by one of my Ironmail server.