First post here - didn't even know you'd all moved form the mailing list

I hope you can help me with a possible hack / advice for this requirement.
We want the agent notifications being sent from OTRS to only be sent when the agent is 'On Call'. (even if we have to hard-code the from-to times).
Basically if a notification occurs outside of these times it shoul dnot be sent. Ideally it would then be sent when the 'from time' is reached, but that's a secondary consideration at this point.
I think the only answer will be something to do with SMTP / MTA on the local box and some cron jobs to make it store-and-forward, but maybe someone here has done something similar before?
Many thanks in advance