For Gmail...
You can use the following information to configure POP with many mail clients.
If you encounter difficulties, we suggest contacting your mail client's customer support department for further instructions.
code:
Incoming Mail (POP3) Server - requires SSL: pop.gmail.com
Use SSL: Yes
Port: 995
Outgoing Mail (SMTP) Server - requires TLS: smtp.gmail.com (use authentication)
Use Authentication: Yes
Use STARTTLS: Yes (some clients call this SSL)
Port: 465 or 587
Account Name: your Gmail username (including '@gmail.com')
Email Address: your full Gmail email address (username@gmail.com)
Password: your Gmail password
You need to enable POP in the Gmail Settings too....
* Did you click 'Save Changes' after enabling POP in Gmail? To ensure that Gmail can communicate with your mail client, be sure to click 'Save Changes' on the Gmail 'Mail Settings' page.