How to get rid of 553 error in Outlook?

I was asked for a receipt, which I allowed but it's never gone. All I get is this message below, There is no message to delete in my outbox. I've tried the yahoo site for answers but there was no response to error 553 Task 'pop.mail.yahoo.co.uk - Sending...

when using outlook to send email i constantly get mail error 553 telling me to verify an alternate email, which has already been done

I keep getting the following message with my Yahoo accounts and also my partners. We both use Outlook Express and have done for years without issue. I have verified my email address repeatedly but after sending a couple of emails i get the same error...

I cannot send email via yahoo from outlook express - i can send it via another provider so it is yahoo not me ! the error message is .....The message could not be sent because the server rejected the sender's e-mail address. The sender's e-mail address...

My Orange email messages comes into Outlook Express fine, but the Bt one has the above error message, yet the messages come onto my MailWasher Spam filter ok, but not onto Outlook Express, I have checked the mail accounts with your questions & answers...

Is anyone having this problem? Error message: Sending' reported error (0x800CCC78) : 'Cannot send the message. Verify the e-mail address in your account properties. The server responded: 553 From: address not verified; see http://help.yahoo.com/l/us...

All of a sudden I cannot send any mail from outlook. I get an error message Sending reported error 0x800ccc0f..... The server responded:535.... I cancelled email scanning in Norton which did not work... I checked my acoount setting which were correct...

I cannot get email in Thunderbird, Mail or Outlook. I get an error message that reads "The RETR command did not succeed. Error retrieving a message. Mail server ...show more

Whenever i try to send a message on a websites contact section i get a pop 3 error message. when i try to set up the pop 3 info it asks for things i can't answer. i'm totally lost. anybody who can help would be appreciated.