IMAP or SMTP

[Dave]

With Gmail, you can use either POP or IMAP.
With POP, your email is downloaded to your computer, and removed from the
server.
With IMAP, the email is downloaded to your computer, but also remains on the
server.

http://mail.google.com/support/

 

[Sally]

where are my IMAP and SMPT? how I find out?

 

[mac]

where are my IMAP and SMPT? how I find out?

See:
http://mail.google.com/support/bin/answer.py?answer=77696
or
http://mail.google.com/support/bin/answer.py?answer=86382