mailer-daemon

A cyber-fiend who hijacks your e-mail transmissions for horrific ends and instantly declares your message a failure.

"...that I may have your hand in matrimony." SEND

MAILER-DAEMON: < message failure>

" O scowl of night!"

by cisco djidd June 28, 2009

[e-mail]

The mailing person who sends your emails back to you with a failure for no visible reason.

aaand, send. Not again! mailer-daemon sent it back once again!
[e-mail]: Message failed to send to <[e-mail]>

by Griggles October 19, 2020