"Offline Gmail is graduating from Labs and becoming a regular part of Gmail," Google programmer Aaron Whyte announced the change Tuesday in a blog post.
Offline Gmail support, which relies on a Google browser plug-in called Gears, lets people read, search, organize, and compose e-mail even when there's no Net connection; sent messages are queued up in an outbox for delivery when the network access is restored and the account on the computer can resynchronize with the server.
"Offline Gmail has proven particularly useful for business and schools making the switch to Google Apps from traditional desktop mail clients--they're used to being able to access their mail whether or not they're online, and Offline Gmail brings this functionality right to the browser," Whyte said.
Google Apps, a bundle that includes Gmail, Google Calendar, and the Google Docs suite of online applications, is available for free for educational users or smaller organizations. Premiere accounts cost $50 per person per year, and Chief Executive Eric Schmidt called such enterprise-oriented services Google's "next big billion-dollar opportunity".
Gears is built into Google's Chrome browser, but other browsers rely on a plug-in. However, Google has stopped developing Gears in favor HTML5's equivalent features. That overhaul of the standard for displaying Web page includes local data storage on a computer as one feature, and it's now enabled by default in Chrome even though HTML5 isn't a final standard yet.
Gears, however, doesn't work for Mac OS X 10.6 users, hampering use of Offline Gmail for many.
"Gears does not currently work on Snow Leopard and there isn't any workaround that we know of at the moment," spokeswoman Victoria Katsarou said, declining to comment on when or even if an HTML5-based version of offline Gmail might arrive.
It doesn't even work in the new Chrome for Mac beta version. Gears is built into Chrome, but trying to enable offline Gmail with the browser yields a "browser not supported" error message.
For the rest of you, here are Google's instructions for getting set up with offline Gmail:
1. Click the "Settings" link in the top-right corner of Gmail.
2. Click the "Offline" tab.
3. Select "Enable Offline Mail for this computer."
4. Click "Save Changes" and follow the directions from there.