The sending issue is the problem I mentioned.
If you have straight-up TWC, smtp.earthlink.net on port 25 shouldn't
ADDENDUM: At least it's not supposed to work. I just checked smtp.earthlink.net on 25 on my non-Earthlink Covad connection [my ISP is Sunset Net; I have Earthlink Premium Mail to preserve my Earthlink and Mindspring e-mail addresses] and I was able to connect. Getting confused all over again...