DanielH wrote:Mail daemons exist today. A daemon is a computer program running in the background; there are usually many per computer, like antivirus, some network management, and a bunch of other things. A mail daemon is there to handle email.
I don’t know whether this is related to Shoal’s reaction. I feel like it isn’t, but I can’t think what else it would be.
an added note that it's not your personal computer that has a mail daemon usually but the server that hosts your email has it: if you email someone, then the mailer daemon on the gmail server or the hotmail server or whatever processes the mail and figures out who should receive it. and if you send an email to an email address that doesn't exist, you get a reply from the mail daemon to tell you they've tried a bunch of times and are now giving up.
For example if you try to write a fairy in hell:
From: "XoxoMacalaurëXoXo Mailer Daemon" <mailer-daemon@hell.circle>
To: Bright
Subject: Mail delivery failed: returning message to sender
Date: this morning
This message was created automatically by mail delivery software.
A message that you sent could not be delivered to one or more of
its recipients. This is a permanent error. The following address(es)
failed:
<Titania@hell.circle>:
SMTP error from remote server for RCPT TO command, host: [hell.circle] ([666.444.222]) reason: 550 5.1.1 <Titania@hell.circle>: Recipient address rejected: User unknown in local recipient table