Ubuntu Server - Looking for software to take commands through email an execute them

I am looking for preferably Opensource software for Ubuntu Mail Server .

Requirement from software would be:

• Listening for incoming emails on a [email protected] .
• In case the incoming email contained one of the predefined codewords, then the software would execute a very specific predefined command/script.
• Perhaps even command line parameter could be passed in either the same or separate emails.
• And perhaps COMMS could even require a termination by a last email.

Ideas are endles... Manifesting them into a piece of software is clearly not as simple.

So please any of you who is aware of such thing out there... It would be appreciated if you could let me know please.

This could be perfect for example to request certain logs, which the person has got no acces to trigger without SSH port open. Like for example Logwatch report genereated and emailed could be triggered from anywhere outside the LAN by email.

This was the closest I could find to the kind of software solution I am looking for, but not exactly a standard software. It is good as an option to think about.

I am sure some of you will say things like it would probably be highly insecure... I am interested in comments like that too, nothing's decided as I am not aware of existence of such software.

I am simply curious of hearing options from people who has got way more experience than I have, of how you would do this, if at all.