Automated Wordpress backup

Lifehut has a good post on how to enable the automatic backup of Wordpress to an email system such as google. Worked great although I couldn't use the form of username+tag@gmail.com as the mail server that wordpress runs on does not allow + in the email address as strictly speaking its not rfc compliant. Yahoo groups also has this problem in that you can sign up for a mailing list with a + in the address but not use that address in their web interface.