I called AT&T tech support and spoke with "Harry" (obviously in India) who (to his credit!) knew exactly the required settings for OSX Mail (but was not at all familiar with PM).
Didn't require much to interpolate the settings for PM (it works!): SETTINGS>MAIL ACCOUNTS: MAIL ACCOUNTS WINDOW APPEARS: Description: Anything EMAIL ADDRESS: Your full email address (e.g., BobWarner @att.net) REAL NAME: Your real name (e.g., Robert Warner) DEFAULT TEXT SIGNATURE: Anything ADANCED: All Blank RECEIVING: PROTOCOL: POP3 USER ACCOUNT ID: Your full email address (e.g. Bob [EMAIL PROTECTED]) SAVE PASSWORD: Your Password (Check this) ADVANCED: USE PORT 995 USE SECURE CONNECTION (SSL) (Check this) SENDING: DESCRIPTION: Anything OUTGOING SMTP SERVER: imailhost.worldnet.att.net AUTHENTICATE AS USER: Your full email address ( e.g. BobWarner @att.net) (Check this) PASSWORD: Your Password ADVANCED: USE PORT 465 USE SECURED CONNECTIONS (SSL) (Check both of these) If any questions, please yell.

