Microsoft Exchange 2003 Send as vs. Send on behalf of

Neil Hobson over at MSExchange.org has a very good article about the differences of "Send as" vs. "Send on behalf of".

The key difference is how the reciever sees the message come in. When using "Send as" the reciever thinks it really came from the sender, but when using "Send on Behalf of" it comes across as "Steve Lippert sent on behalf of Steve's Manager".