I have three mail accounts in mac Mail - Personal, Work local, and Work global. I'd like to receive calendar invites from the first two, but the third is much too busy with invites that don't concern me. Is there a way for me to specify that only invites from the first two should be accepted?
Check out www.nhoj.co.uk, in particular the iCal Reply Checker. If John's software is not what you are looking for, you could write an Applescript to make do.