Can't send email
I'm using Fedora Core 5, and Evolution mail client.
I can receive email, but cannot send anything via smtp. I called the isp, and the tech said everything appears to be working at their end. I reviewed the setup with him, and he said it looked right. Each time I attempt to send mail, I get a message that says it can't authenticate my password. I tried Thunderbird and got a similar response. Any fixes?