what you are setting up is the scanner to send an email. So it is whatever your mail provider tells you are their SMTP settings. It is in no way related to Thunderbird.

pscheck2 said

I want to be able to send a scan doc via e-mail and ny client erbird. When setting this up in Windows Fax ans Scan it asks for a Port #? my question is where do I find this info and, how do I get into it?

Thanks for your answer; it is much appreciated!