I have been using the plugin to send mewnsletetrs for a long time now and all was good. Today,I tried sending a test email to my own address and got this error:
FAILED (SMTP Error: The following recipients failed: ????????@yahoo.com: Please turn on SMTP Authentication in your mail client. (carsmerchandise.com) [220.127.116.11]:34518 is not permitted to relay through this server without authentication. )
– Try to remove the return path on main settings.
Do you know what has happened? Is this something you can help me with?
Regards and grazie.