One of the most requested Gmail features was the addition of IMAP support. You’re always connected to the server, more clients can connect to the same account, you can obtain the text from a message without the attachments and the state information is synchronized.

Gmail added IMAP support, but you’ll have to enable it by going to Settings > Forwarding and POP/IMAP. Because the new feature is slowly rolled-out, you may not see it, but rest assured it will be available in the next days. Gmail’s help provides more information about configuring your client, whether it’s Microsoft Outlook, Thunderbird, Blackberry, iPhone, Windows Mobile or Symbian device. You should also make sure you use these recommended settings.

Via | Googlesystem.blogspot.com