So the other day, I'm trying to figure out how to read an Exchange mailbox from GMail and it's really starting to get to me because I just can't get the stupid thing to work. It shouldn't be that hard, because it's possible to use an IMAP or POP3 connection to Exchange, after all, but I just can't get the GMail connection to work. To make matters worse, if you search for it (my usual method of solving such a problem), you end up with results, but not of the correct variety. You get pages that tell you how to forward from GMail to Exchange, and pages that tell you how to use GMail as a business platform - but not what I really want, which is simply to have GMail do the checking with Exchange being a regular POP3 account. So I had to keep digging.
I'll tell you first that it is possible. Secondly, you do need to have POP3 configured (you should probably have guessed that one). Finally, it's really not hard - you just have to be willing to play around and guess a few times in order to figure out the answer. After that, it works like a champ.