I have two email accounts w/ google and I'm trying to setup mutt so
that I can read them (using 'c' to change the folder), but I cannot
figure out how.
My .muttrc is this (of course I changed the username and psw):

set imap_user = "usernamei@gmail.com"
set imap_pass = "mysupersecretpassword"

set smtp_url = "smtp://username@smtp.gmail.com:587/"
set smtp_pass = "mysupersecretpassword"
set from = "username@gmail.com"
set realname = "username@gmail.com"

set folder = "imaps://imap.gmail.com:993"
set spoolfile = "+INBOX"
set record="+[Gmail]/Sent Mail"
set postponed="+[Gmail]/Drafts"

set header_cache="~/.mutt/cache/headers"
set message_cachedir="~/.mutt/cache/bodies"
set certificate_file=~/.mutt/certificates

set move = no

set sort = 'threads'
set sort_aux = 'last-date-received'

ignore "Authentication-Results:"
ignore "DomainKey-Signature:"
ignore "DKIM-Signature:"
hdr_order Date From To Cc


Also another info: everytime I connect, mutt fetches all the messages
on the server. Is there a faster way to retrieve just the new
messages ?