Server Error: 550 emails blocked from send.
You are trying to send emails for lets say user@domain1.com, by using outgoing email server smtp.damain2.com. In short, you are using the wrong outgoing email server or there is a typo in your email address, especially at the domain part of the email address.
Therefore, you are not authorized, to use the outgoing server for sending mails and get the error 550 (Relay access denied).Wow, this was short :-)
