Cannot send mail from OE

Need help badly--this is the error message I receive when I try to send email from OE6:

The connection to the server has failed. Account: ********, Server: ********, Protocol: SMTP, Port: 25, Secure(SSL): No, Socket Error: 10061, Error Number: 0x800CCC0E
OR
Your server has unexpectedly terminated the connection. Possible causes for this include server problems, network problems, or a long period of inactivity. Account: *******, Server: ********, Protocol: SMTP, Port: 25, Secure(SSL): No, Error Number: 0x800CCC0F

I put in the *** for privacy matters.

I used to have no problems and now this. I went over the settings with a tech and the only thing he could come up with is that i might have to do with my internet security. We also tried other ports but that didn't work either.

I use Norton Internet Security--could Norton have something to do with this problem? It is driving me crazy--

Will really appreciate any and all help!

 

Noticed the problem over the last 2 days.

Not sure what you mean re: email account with one ISP but connected to a different one.

I have 3 email accounts set up in OE. One is my personal one and the other 2 are email for business. No problem with my personal account. I just changed to ATT a few days ago. I also changed the incoming mail/outgoing mail for the business accounts per a tech for that email service. He even had me try different ports--no good. Could Norton have something to do with it since I changed the incoming/outgoing mail settings for the two business accounts? The tech mentioned that it could be Norton but, of course, they don't support Norton. All I can say is that all 3 accounts worked before.

I've seen sites for repairing the socket error 10061 but hesitate to do that without knowing what it even means!

Thanks for the speedy response--have to get this solved!

 

Well, finally have it fixed--it was a port setting for the outgoing mail. Actually the tech yesterday had me try this but for some reason it didn't work then. I just kept trying everything and finally it clicked it.

Many thanks for your help--appreciate it!