FAQ: WHY IS MY EMAIL BOUNCING BACK?

In most cases when email is being returned it will contain information explaining the bounceback. Most bounce backs occur because the target could not be found, possibly because the receiving domain name has expired. If you receive messages such as this it's best to find an alternate method to contact the people you wish to email.

The other culprit is often a block setup that isn't allowing your email through, perhaps recognizing your address as spam and rejecting the email. In most cases you will be supplied with information on why the email was blocked and what program was being used and usually you will find a link to view which contains information on how to get your address unlocked so that you can send emails to the recipient.