ScottishWarrior, I did do some research, and had you done yours and looked into the settings file you would know that there are servers for each carrier.
Below is a list of the Sprint Servers:
AIMCLOGINURL:
https://aim.imgateway.sprintpcs.com:443
MSNCLOGINURL:
https://msn.imgateway.sprintpcs.com:443
YHOOCLOGINURL:
https://yahoo.imgateway.sprintpcs.com:443
If you're going to question somebody you should have the proof to back it up, don't you think?