I noticed today that Rob Buckley released an AppleScript to bring support to return-receipts in Entourage. The script is simply called Entourage Read Receipt and is currently available in version 1.0b1 (I understand from the b1 that it is a beta version that might still have a few bugs).
There are limitations to return-receipts, but this feature has been asked by quite a few people on the newsgroups so the script should definitively fill a gap :-)
