550 A user policy is preventing you from sending e-mail to this address. Please contact your e-mail administrator

This usually happens because you have added the email address that's trying to send you an email to your blacklist. The blacklist is a list of email addresses which will be blocked.

You can manage by your blacklist by logging into webmail.

For instructions on how to access webmail, please click here.

For instructions on how to use the blacklist, please click here.