Google offers enough space these days to hold all the chain letters and spurious email attachments that you could possibly want.

But Rob Siemborski, an engineer on Google's webmail service, says there's even more on the way.

Google originally started increasing Gmail's storage in April 2005, as part of the company's "Infinity+1" storage plan, the engineer said on the company's official Gmail blog.

"At that time, we realised we'd never reach infinity, but we promised to keep giving Gmail users more space as we were able," Siemborski said.

"That said, a few of you are using Gmail so much that you're running out of space, so to make good on our promise, today we're announcing we are speeding up our counter and giving out more free storage."

And that's not all. Schools and other organisations using Google Apps to get Gmail on their own web addresses are also getting a storage boost.

That will take the Standard and Education Edition storage from 2GB up to the rate currently showing on Gmail's storage counter.

Siemborski said businesses or individuals using the Premier Edition will also be upgraded from 10GB storage to 25GB.