Undelivered mail

How to retrieve undelivered mail?

When you find out that and e-mail did not get delivered to you and the sender still has the undelivered e-mail in the "sent" folder, the sender can forward the undelivered e-mail to you in attachment to a new e-mail.

The reason for sending the e-mail in attachment and not just forwarding it, is because in the latter case it might be held back as spam.