Outlook Not Alternate Email Yahoo How Do I Get Rid Of A 553 Error In Outlook/Yahoo.?

How do I get rid of a 553 error in Outlook/Yahoo.? - outlook not alternate email yahoo

I demanded a receipt, which allows me to, but never disappeared.
All you get is this message later, no clear message in the Outbox. I tried Yahoo Answers, but there was no response to an error 553

Pop.mail.yahoo.co.uk Task - Sending reported error (0x8004210B): "The operation is waiting for a response from the sending (SMTP) server timed. If you are still seeing this message, please contact the server administrator or Internet Service Provider (ISP). server response: 553 From: watch does not confirm address; http://help.yahoo.com/l/us/yahoo/edit/al ...