Failed Recipient: firstname.lastname@example.org
Reason: Remote host said: 550 Please turn on SMTP Authentication in your mail client, or login to the
IMAP/POP3 server before sending your message. mail.MYDOMAINNAME.com
[18.104.22.168]:57707 is not permitted to relay through this server without authentication.
Trouble logging in? Simply enter your email address OR username in order to reset your password.
For faster and more reliable delivery, add email@example.com to your trusted senders list in your email software.