The incoming settings will vary depending on who and how your emails are hosted but most phones will be able to auto configure using your username and password and setting the incoming mail server to whatever you domain name is. For example my email address is adam@telaustralia.com.au so the domain name is telaustralia.com.au. This means that the incoming mail server name will be mail.telaustralia.com.au
The typical outgoing settings for pop3 accounts will be as follows :
Outgoing Mail Server : mail.optusnet.com.au
Use SSL should be selected
Authentication Type : Password
Server Port 25