RPost RMail for Apple
Download these RMail Mobile Apps directly to your iPad or iPhone or "Send Registered™" from your Safari Browser with the RMail Web App. Maintain your current email address, username and password. No need for new email boxes, no start-up costs, no complexity.
Services included in these Apps are: RPost Registered Email®, RPost Electronic Signatures, RPost Send for Signature, RPost Encrypt. The applications also include an administrative back-end for corporate deployments.