I am on a G4 Powerbook and recently upgraded to Leopard. I have all of the updates installed (finally) and everything is up to date. I am on dialup (netzero). My problem is that I can receive messages of any size like I always did in Tiger with no problems but when I try to send a message larger than 5kb Mail seems to hang. It just won't finish sending. If I am at a wi-fi hotspot it sends just fine, but not on dialup. Any suggestions?