Ok well I'm starting to run out of ideas. Possibly worth a look at are http://forum.portforward.com/YaBB.cg...num=1107559121 & also http://www.portforward.com/routers.htm

Is your OSX firewall turned on? If yes, check it for for what it's blocking.

Are you able to use that emailing service whilst LW is closed? If yes then there seems to definitely be some link.

Sorry if I wasn't of any more help but perhaps someone else will see this thread & have some ideas.