Hmm weird. I get a different error I never got before with these lol. I get either 403 or proxy timeout with any other settings, now I get failed to POST: timeout or error when reading http header
**EDIT** Once I changed "http://mmsc.cingular.com" to "mmsc.cingular.com" I got my normal 403.
I tried calling AT&T today... I have two beefs. I don't get the "ViewMyMessage" text when I get MMS messages like everyone else even with plain locked iPhones get. WTF? So I figure I'd go in a two prong approach, get this sorted out first then I can work on adding the MMS package and getting swirlymms to work.