One of my sites on Cloudflare, hosted with GoDaddy, gives this error when trying to send mails:
This message was created automatically by mail delivery software. A message that you sent could not be delivered to one or more of its recipients. This is a permanent error.
This was the full message, Cloudflare didn’t allow it in the initial topic:
This message was created automatically by mail delivery software. A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed: [[email protected]](mailto:[email protected]) host [sxb1nlsmtpcp-v01.prod.sxb1.secureserver.net](http://sxb1nlsmtpcp-v01.prod.sxb1.secureserver.net/) [92.204.64.10] SMTP error from remote mail server after end of data: 552 5.2.0 UTKNp684t5caqUTKNpOSOl :CPANEL: Access to this mail system has been blocked for [[email protected]](mailto:[email protected]) due to spam activity. Spam was seen coming from this account, and possibly other scripts running in it. For help resolving the issue, see http://x.co/spamclean. Once the compromise has been cleaned, please contact customer support to remove the block. Reporting-MTA: dns; [n3plcpnl0189.prod.ams3.secureserver.net](http://n3plcpnl0189.prod.ams3.secureserver.net/) Action: failed Final-Recipient: rfc822;[[email protected]](mailto:[email protected]) Status: 5.0.0 Remote-MTA: dns; [sxb1nlsmtpcp-v01.prod.sxb1.secureserver.net](http://sxb1nlsmtpcp-v01.prod.sxb1.secureserver.net/) Diagnostic-Code: smtp; 552 5.2.0 UTKNp684t5caqUTKNpOSOl :CPANEL: Access to this mail system has been blocked for [[email protected]](mailto:[email protected]) due to spam activity. Spam was seen coming from this account, and possibly other scripts running in it. For help resolving the issue, see http://x.co/spamclean. Once the compromise has been cleaned, please contact customer support to remove the block.