authentication failed message

tryiing out the free version.  entered my password for comcast.net, and the email client is receiving messages, but I keep getting an authentication failed message.  Also the program is trying to set up an account @me.com, which I don’t use.  (I don’t use @icloud.com either)
David R

Authentication errors are either because of incorrect credentials or incorrect port and security policy combinations.

If you are sure you login name and password are correct, then you can check your account settings in Menu > Tools > Accounts.

SMTP
Port 587 = Force usage of SSL/TLS
Port 25 = Use SSL/TLS if available
Port 465 = Use SSL/TLS on special port (legacy)

IMAP
Port 993 = Use SSL/TLS on special port (legacy)
Port 143 = Use SSL/TLS if available

POP3
Port 995 = Use SSL/TLS on special port (legacy)
Port 110 = Use SSL/TLS if available

These are the correct combinations of port and security policy. The underlined ones are the best option for security if your server supports them. SMTP port 465 was reassigned and should no longer be used for SMTP, though many mail providers still recommend and use it.