Quick answer:Incoming Mail Server: pop.jtan.com
Outoging mailserver should be given by your dialup/DSL/cable ISP or on your local net. However, if these are broken:
Outgoing mailserver: smtp.jtan.com
The general JTAN mail setup page is
http://www.jtan.com/faq/faq7.html
For more details on secure mail, read this document: http://www.jtan.com/resources/apop.html