Abstract: A computer-implemented method of email processing within a multitenant unified communications environment includes receiving, at a first email system component that is a sub-component of a unified communications system, an email that is addressed to a recipient by way of a delivery address that includes a first domain identifier. Based at least in part on the delivery address, a second delivery address associated with the user is identified. The second delivery address does not include the first domain identifier but does include a second domain identifier that is different than the first domain identifier. The email is automatically sent to the second delivery address.