error message
The error message I get says:
Message delivery failed.
The sender address (my addresss)@yahoo.com was rejected by the server
The server response was: authentication required - for help go to
http://help.yahoo.com/help/us/mail/pop/pop-11.html
You can try to send using a different server. All messages will use this server until you quit or change your network settings.
Then it gives me the option to send thru another server (my dial up account - which I am cancelling since I now have a cable modem).
I tried the Yahoo page, but it does not list mail as being supported. They also recommend changing the port to 587, which I tried but it doesn't seem to matter. Occasionally, if I change to "another server" (but actually just change it to the yahoo one) - it will then send. However, this is unreliable and annoying.