[Alug] Contemplating Exim

Hi folks, I'm contemplating using Exim as a replacement for Deadmail, and was wondering if there are any pros and cons associated with migrating everything on the existing server (including these lists) to Exim? I've had a bit of a play with it this afternoon and it's straightforward for me, but I don't want to suddenly find that I've run across a compatibility issue that may be lurking somewhere. Regards, Martyn