Can send, not receive

[unrox]

All of a sudden I cannot receive any mail, can send, everyone that e-mails
me says they get a notification that __kinjt@comcast. is not a valid address,
the first three letters are not coming up in the receive mail, my full
address is xyz@comcast.net.

[PurpleDemon]

Reporting-MTA: dns; IMTA33.emeryville.ca.mail.comcast.net [76.96.27.218]
Received-From-MTA: dns; web38204.mail.mud.yahoo.com [209.191.124.147]
Arrival-Date: Thu, 12 Nov 2009 06:34:16 +0000


Final-recipient: rfc822; xyz@comcast.net
Action: failed
Status: 5.1.1
Diagnostic-Code: smtp; 550 5.1.1 No such user here
Last-attempt-Date: Thu, 12 Nov 2009 06:34:17 +0000

No such user?

[UncasMS]

i have edited the shown mail address just to make sure it will not end up being scammed

[Alien Bay]

Have you tried calling Comcast?
Also, if you don't want to sit on eternal hold with Comcast, you may want to copy all the setup for the email account (ie pop3 incoming/outgoing addresses, port etc) then delete and rebuild the account within your mail application.

[doctorhardware]

Call comcast are you joking aren't you, they can't program themselves out of a wet brown paper bag.