The server 18.104.22.168 ( a2nlsmtp01-04.prod.iad2.secureserver.net ) is either again or still blocked by multiple blacklist sites. Could Godaddy support please fix this, a number of our clients cannot receive our emails.
Checking it today, not only is this server still blacklisted but the number of sites blacklisting it have grown. It would sure be nice if someone from Godaddy would read these threads and do something about the issues....
Reason: There was an error while attempting to deliver your message with [Subject: "test"] to email@example.com. MTA p3plwbeout02-04.prod.phx3.secureserver.net received this response from the destination host IP - 22.214.171.124 - 554 , 554 5.7.1 <p3plsmtp02-04-2.prod.phx3.secureserver.net[126.96.36.199]>: Client host rejected: "Client hostname blocked."