[otrs] Infinite loop?

[jtown at eml.cc]

Hello,

A question about the way OTRS works. Let's say:

-You receive support requests at support at domain
-You, as an agent, need to open a ticket, so you open a ticket which
will have support at domain as email address
-The ticket finishes in a queue where follow up after close it's not
possible.
-The ticket is closed so the system will send a notification to the user
(support at domain)
-The system receives the mail and will think it's a follow up for that
ticket so it will reject it.
-The rejected notification will be sent to support at domain so we'll have
an infinite loop.

Is this right? Will loop protection prevent this? Which is the official
advice to prevent this? Because although the loop protection works,
you'll have a 'dirty' history for that ticket?

And by the way, the sysadmin option "PostmasterMaxEmails" says "Maximal
post master daemon email to own email-address a day. Loop-Protection!
Default: 40" so if the systems receives 40 mails a day it will stop?
What does it mean?

Thanks a lot in advance,

J