Enabling POP for Gmail: (this downloads all your email off the server)
https://mail.google.com/support/bin/answer.py?answer=13273
To enable POP in Gmail:
1. Sign in to Gmail.
2. Click Settings at the top of any Gmail page.
3. Click Forwarding and POP/IMAP.
4. Select Enable POP for all mail or Enable POP for mail that arrives from now on.
5. Choose the action you'd like your Gmail messages to take after they are accessed with POP.
6. Configure your POP client* and click Save Changes.
Gmail POP Settings:
Configure your client (Eris) to match the settings below:
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 full email address (including @gmail.com or @your_domain.com)
Email Address: your email address (username@gmail.com or
username@your_domain.com)
Password: your Gmail password
to keep email on the server check settings in gmail, or try using the "recent" settup.
Using POP on multiple clients or mobile devices - Gmail Help
-------------------------------------------------------------------
Enable IMAP in Gmail Settings:
1 Sign in to Gmail.
2 Click Settings at the top of any Gmail page.
3 Click Forwarding and POP/IMAP.
4 Select Enable IMAP.
IMAP settings:
Incoming settings
IMAP server: imap.gmail.com
Port: 993
Security type: SSL (always)
Outgoing settings
SMTP server: smtp.gmail.com
Port: 465
Security type: SSL (always)