...ATT mail site as an extra email account? I use AT&T DSL for internet which uses Yahoo mail for email. I set up "jc.bates01.yahoo.com" as my extra email account on my "[email protected]" email account a few months ago and it was working fine until last Tuesday, Mar. 3, 2009 when I stopped receiving emails sent to the yahoo.com address. The sender gets a 544(?) failure notice saying [email protected] is not a valid address. I can send email from jc.bates01.yahoo.com but am not receiving anything. The mail site within AT&T/Yahoo says the yahoo.com mail is supposed to be forwarded to my sbc.global.net email account, and that's the way it worked up until Tuesday last week.