Why do I get a "Failed Delivery" message?
When you get mail from a "MAILER-DAEMON" or a "Mail Delivery Subsystem" with a subject similar to "Failed Delivery", this means that a message you sent was undeliverable and has been "bounced" back to you. These messages are produced automatically and usually include a reason for the delivery failure.
Bounced messages normally consist of two parts. The first contains the reason for the bounce; the second contains the original message.
The most common reason for a failed delivery is that the email address entered isn't valid. If the Mailer Daemon says that the email account doesn't exist, double-check the spelling of the email address. If the message continues to be bounced back, you may want to verify that the email account hasn't been closed or moved.
If there's a different reason given, and you would like us to investigate it, just let us know. If you can copy and paste the reason given for the failed delivery into the message you to send us, it will help us determine why the message bounced.