Thanks. Using cwmx.com worked.
Comcast is taking over from Time-Warner/RoadRunner in my area. Anyone know if Comcast has the same rules?
ETA: From a web search, looks like Comcast is the same.
Glad to help. I am pretty sure almost all ISP's are the same way. Apple/AT&T are going to have to come up with some sort of solution or there are going to be a lot of upset people, and they can forget about selling these to business. Below is what Road Runner had to say about this.
"I appreciate you taking the time to provide feedback regarding
connectivity to Road Runner email through the IPhone device. Road Runner
implements security features which prevent the use of SMTP relays
(forwarding email from a different network through Road Runner SMTP
servers). As open relays are one of the main sources for the
distribution of unsolicited email, efforts are made to prevent as much
as possible the distribution of such through the Road Runner network. We
do provide remote access to Road Runner email through our webmail
interface which can be accessed through a web browser from any
connection to the Internet. Email can be received and sent through the
webmail interface. It is also possible to configure email forwarding
through the webmail interface should you wish to have your email
forwarded to an alternate email address.
It may also be possible to configure your mobile device to use the Road
Runner POP3 server for inbound email and use an alternate SMTP server on
the network to which you are connected for outbound email. SMTP server
information can generally be obtained from the network service provider
you are utilizing for your mobile device. "