Hi, all.
For those who may be interested, my e-mail and internet access problems have
been solved.
It turns out that my Windows XP machine here didn't like the WPA security
settings for our home wireless router, but likes the WEP settings instead.
Switching to WEP security seems to have solved the problem.
Thanks to all who provided help both on and off list!
73 from Tom Behler: KB8TYJ