Abstract: Systems and methods which facilitate single user sign-in for multiple accounts are shown. Embodiments create a single user base which maps users to multiple accounts. The use of a single set of credentials by the user is provided for according to embodiments irrespective of the applications associated with the various accounts having very different security protocols. A system hosting the shared user base preferably provides a single authentication point for multiple services. Embodiments an authenticator string, as may be passed between a client and bridge server and/or client and application, in order to enable user access, detect attacks with respect to a client conversation, etcetera. In addition to providing a shared user base for single sign-in, embodiments provide additional shared functionality and/or functionality not available from the applications themselves.

Abstract: Systems and methods which facilitate single user sign-in for multiple accounts are shown. Embodiments create a single user base which maps users to multiple accounts. The use of a single set of credentials by the user is provided for according to embodiments irrespective of the applications associated with the various accounts having very different security protocols. A system hosting the shared user base preferably provides a single authentication point for multiple services. Embodiments an authenticator string, as may be passed between a client and bridge server and/or client and application, in order to enable user access, detect attacks with respect to a client conversation, etcetera. In addition to providing a shared user base for single sign-in, embodiments provide additional shared functionality and/or functionality not available from the applications themselves.

Abstract: Methods and systems for providing a proof of mailing service include receiving from a user a designation of a recipient to receive an item to be mailed, and receiving a free-form description of the item. Postage indicia is printed bearing an amount of postage for a mail piece containing the item. In response to the mail piece being processes by a postal authority, a transmission from the postal authority containing a scanned image of the mail piece is received. The recipient is then sent a notification that the item has been mailed, and the notification includes the free-form description of the item and access to the scanned image.