How do you get rid mailer deamon?

Answer 1

The Mailer Daemon is a resident on the mail server, and despite its name is not evil so much as a tireless worker. Some think the Daemon title was given because its job is so thankless (telling people the address was typed wrong, the mail is undeliverable, the mailbox is full, etc); others believe it is a reference to Terry Pratchett's imps, though I believe the chronology doesn't bear that out.

Regardless, to never again encounter the mailer daemon, either never again send a letter, or make very sure your recipients' names are typed correctly and their mailboxes have enough room. If you have trouble with attachments, it may be your outgoing mail service's rules don't allow you to send anything that big/that type/etc.