Send out of office Messages only once to every user

[FunkyFleaBass]

Hello there

I have just signed up, because I happen to have an issue with my ispCPOmega Server. I hope I have posted this thread in the right forum.

I am using ispCP 1.0.4 OMEGA build: 20100228 Codename: Priamos on an Ubuntu installation.

I want to configure ispCP / postfix in a way that the "out of office" messages will only be sent once to each recipient.

Can anyone tell me how to realize this project or give an idea for possible approaches?

Any help would be much appreciated.

Kind regards and thanks in advance
Sam