[GuillaumeB]

I understand that setting IMAP on the client s basically reproducing
the web interface and that messages are not completely downloaded. Am
I right?
Does it mean that my client will not download several hundreds of MB
of emails and eat up the memory of my phone?

In fact i was wondering what exactly is downloaded before setting up GMail
IMAP on a phone

[mduell]

Yes, the phone should only download headers instead of the full message until you tell it to.

[the_snitch]

It works a lot better than the POP implementation. Now you can actually have your account set up in Mail.app on your mac, and on your iphone, and have them sync everything between the two, as well as the web interface.

All clients will keep track of what has been read/unread, gmail "Tags" show up as folders on your iPhone/Mail.app, and moving messages into folders will tag the messages in the web interface.

Moving a message to the "Trash" folder will Delete it, and doing a regular "Delete" from your inbox will just archive it in Gmail. Very Useful IMO

Here's a useful link for setting it up
iPhone