Tickets keep getting reopened by email from otrs

[joebie]

When a ticket is created and solved, the system will send an email to the customer but also to otrs itself. This latter email keeps reopening the ticket after it's been closed. Some tickets will close when using close (internal note) but most will reopen or have to be closed multiple times.

What are we doing wrong?

The config export is attached.
The history and other info of the install:

OS: linux gentoo
Version: 3.0.8
Added external email account
Added cron job for auto get email (otrs.PostMasterMailbox.pl)
Renamed ticket states to dutch translation
Renamed ticket states back to english the rename gave to many problems

[MichaelR]

Why have you set it up to email itself on ticket closure?

[joebie]

That's kind of my question I don't want this behaviour, if I can remove this email to self I will be a happy man and my problems will be gone. But I can't find where this email to self is coming from.

I welcome any suggestions.

[crythias]

It's likely there is an agent who has the same email address as the inbox of otrs. That's pretty not ok.