Problems sending emails

Suddenly, whenever I try to send an email, a message pops up saying "Cannot Send Mail. A copy has been placed in your Outbox. The sender address '******@***.com' (my email address) was rejected by the server." This started when I tried sending a picture to a friend and now it happens when I send anything to anybody. What do I do?

rdowns said:

Who's the ISP?

Click to expand...

Comcast.

I guess I sort of misread your question. My internet service provider is Comcast and I use AIM mail. Either way the other thread helped me out. And the only reason it suddenly stopped working is because I switched primary email address. Thanks!

double post, my bad