We have just installed a new webmail client, which is slicker (but therefore a bit slower) than the current client.  It also allows you to compose fancy (HTML) emails, with colour, different fonts etc (everything you would expect from a major webmail provider or software-based email client).

@mail is available to everyone via http://yourdomain.com/atmail

Or feel free to just use http://elegantlogic.com.au/atmail