The e-mail system was unable to deliver the message, but did not report a specific reason. Check the address and try again. If it still fails, contact your system administrator. #5.0.0 smtp; 5.3.0 - Other mail system problem 554-'5.7.1 Virus Heuristics.Phishing.Email.SpoofedDomain detected by the ClamAV AntiVirus' (delivery attempts: 0)...
Has anyone come across this type of error before? Mail can be sent only with text in the subject field. No new mails can be sent when data is added to the e-mail.
Thank you
David