AT&T Yahoo - New Security Settings
Users have reported that using AT&T Self Support Tool has caused problems. Sadly, this is often the case for Mac users installing email settings. Enter your data manually.
If you have trouble sending, and receive this error: "the authentication type is not supported by Entourage". Check this page: Problems after conversion to AT&T (formerly BellSouth) for a possible solution.
See Alert for AT&T Yahoo Users Alert
Yahoo Plus: 535 authorization failed (#5.7.0) when sending
Screenshots of the new AT&T desired settings for security enhancements.
Step 1: Change the POP and SMTP server addresses
Step 2: Use the advanced setting to check SSL and make sure you type in the 995 but do not check the box.
Step 3: Do the same for SMTP but check all three boxes and type in port 465.
