POP3 SMTP Mail Servers for GoDaddy Internet Service Provider

GoDaddy incoming mail server: mail.godaddy.com
GoDaddy outgoing mail server: use your ISP’s SMTP mail server

POP3 SMTP Mail Servers for 1&1 Web Hosting Provider

1&1 incoming mail server: pop.1and1.com
1&1 outgoing mail server: smtp.1and1.com

The POP3 incoming mail server and SMTP outgoing mail server for Comcast, an Internet Service Provider (ISP) are:

Comcast incoming mail server (POP3): mail.comcast.net
Comcast outgoing mail server (SMTP): smtp.comcast.net

The News server for Comcast is: newsgroups.comcast.net