An email I've sent has been bounced back to me. What should I do?
Occasionally, we may not be able to deliver your emails. There are several reasons why this may happen, including a misspelled destination address, a security policy at the recipient's server, because the recipient's mailbox is full and doesn't accept any more emails or because the destination server is not responding.
If we can't deliver your email, we will send you a message indicating the delivery error. This is what you should do next: