Internet e-mail bridge

• US 7,865,554 B2
• Filed: 03/14/2002
• Issued: 01/04/2011
• Est. Priority Date: 03/14/2002
• Status: Active Grant

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Corporation
• Inventors: Brubacher, Douglas K., Passuello, Luciano
• Primary Examiner(s): LAZARO, DAVID R
• Application Number:
  US10/097,286
• Publication Number:
  US 20030177188A1
• Time in Patent Office: 3,218 Days
• Field of Search: 709/202, 709/206, 709/218, 709/207, 709/203, 709/228, 719/315
• US Class Current: 709/206
• CPC Class Codes: G06Q 10/107 Computer-aided management of electronic mailing [e-mailing]
• CPC Class Codes: H04L 51/066 Format adaptation, e.g. format conversion or compression
• CPC Class Codes: H04L 51/42 Mailbox-related aspects, e.g. synchronisation of mailboxes
• CPC Class Codes: H04L 51/56 Unified messaging, e.g. interactions between e-mail, instant messaging or converged IP messaging [CPM]
• CPC Class Codes: H04L 67/10 in which an application is distributed across nodes in the network software deployment G06F8/60; multiprogramming arrangements G06F9/46

Abstract

An Internet mail bridge is provided for downloading e-mail messages from Internet mail servers supporting different e-mail access protocols, such as the Post Office Protocol 3 (POP3) and Web Distributed Authoring and Versioning (Web DAV) protocol, and delivering the downloaded messages, which are in different formats, to a mail server on a local area network. The Internet mail bridge has a mail manager that is independent from particular e-mail protocols or e-mail formats. For each e-mail account, the mail manager instantiates a mail connector object that contains logic for downloading e-mail according to the e-mail access protocol of that account, and invokes the mail connector object to download e-mail messages from that account. The mail manager then instantiates and invokes mail deliverer objects tailored for handling different message formats to deliver the downloaded messages to the local mail server.

Claims

1. A computer storage medium encoding computer-readable instructions that, when executed by a processor, perform a method at an email bridge for providing an e-mail service at a local mail server, the method comprising:

employing a processor executing computer executable instructions stored on a computer readable storage medium to implement the following acts;

retrieving a first message from a first Internet mail server having a first Internet e-mail account, wherein the first message and the first Internet mail server support a first e-mail access protocol, wherein the first message is retrieved by instantiating a first connector object having logic for downloading e-mail according to the first e-mail access protocol of the first Internet e-mail account;

retrieving a second message from a second Internet mail server having a second e-mail account, wherein the second message and the second Internet mail server support a second e-mail access protocol, wherein the second e-mail access protocol is different from the first e-mail access protocol, and wherein the second message is retrieved by instantiating a second connector object having logic for downloading e-mail according to the second e-mail access protocol;

invoking a first deliverer object to deliver the first e-mail messages to the local mail server, wherein the first deliverer object supports the first e-mail access protocol; and

invoking a second deliverer object to deliver the second e-mail message to the local mail server, wherein the second deliverer object supports the second e-mail access protocol, and wherein the first and second messages are accessible to a user associated with the local mail server.

2. The computer storage medium of claim 1, wherein the act of instantiating includes retrieving a connector identifier associated with the email access protocol of each Internet e-mail account, and wherein the instantiated connector object corresponds to the connector identifier.

3. The computer storage medium of claim 1, wherein the act of invoking includes storing each of the e-mail messages downloaded from each Internet mail account in a mail queue with format identification data identifying a message format of each downloaded e-mail message.

4. The computer storage medium of claim 1, having further computer-executable instructions for obtaining a thread for each of the Internet e-mail accounts, and wherein the acts of instantiating and invoking for each Internet e-mail account are performed within the thread for each Internet e-mail account.

5. A computer-implemented e-mail service, comprising:

a processor

a computer-readable storage medium operationally coupled to the processor and storing computer executable instructions, the computer executable instructions, when executed by the processor, implement components comprising;

an e-mail retrieval component located on a local area network that retrieves e-mail messages from e-mail accounts located at a plurality of Internet e-mail servers supporting different e-mail access protocols;

a plurality of e-mail connectors, each e-mail connector having logic for downloading e-mail according to one of the e-mail access protocols, wherein the plurality of e-mail connectors comprise;

a first e-mail connector supporting a first e-mail access protocol; and

a second e-mail connector supporting a second e-mail access protocol, where in the second e-mail access protocol is different from the first e-mail access protocol;

a plurality of e-mail deliverers, each e-mail deliverer having logic for delivering downloaded messages in one of e-mail formats associated with the e-mail access protocols to the e-mail server on the local area network, wherein at the plurality of e-mail deliverers comprise;

a first e-mail deliverer supporting the first e-mail access protocol; and

a second e-mail deliverer supporting the second e-mail access protocol;

a download manager programmed, via the processor, to retrieve protocol information identifying an e-mail access protocol used for each Internet mail account and invoke one of the e-mail connectors corresponding to the e-mail access protocol of each Internet mail account to download e-mail messages from each Internet mail account from each respective Internet email server; and

a delivery manager programmed to select, via the processor, for each downloaded e-mail message, a mail deliverer corresponding to a message format of each downloaded e-mail message and invoke the selected mail deliverer to deliver each downloaded e-mail message to the mail server of the local area network.

6. The computer-implemented e-mail service of claim 5, further comprising computer-executable modules comprising:

a bridge service for initializing the download manager and the delivery manager according to a predefined schedule; and

an information store module for maintaining an information store for storing information including account information for the Internet mail accounts, the account information for each Internet mail account identifying an e-mail access protocol used by each Internet mail account.

7. The computer-implemented e-mail service of claim 5, wherein the mail deliverers include a first mail deliverer programmed to handle delivery of e-mail messages of a first message format by converting an e-mail message in the first format into a converted message of a second message format, and invoking a second mail deliverer for delivering e-mail messages in the second message format to transmit the converted message to the mail server of the local area network.

8. A method for providing an email service comprising:

employing a processor executing computer executable instructions stored on a computer readable storage medium to implement the following acts;

retrieving, at least one or more e-mail messages from a plurality of Internet e-mail accounts supporting different e-mail access protocols located on a plurality of Internet email servers to a mail server of a local area network, where each of the Internet email accounts provides an e-mail account record identifying an e-mail access protocol to be used for downloading e-mail messages from each Internet e-mail account;

instantiating a connector object having logic for downloading e-mail according to the e-mail access protocol of each Internet e-mail account, wherein a separate connector object is instantiated for each Internet e-mail account, and wherein each separate connector object supports a specific e-mail access protocol for the Internet e-mail account;

invoking the connector object for each Internet e-mail account to download e-mail messages in each Internet e-mail account from each respective Internet email server to the mail server of the local area network.

9. The method of claim 8, wherein instantiating includes retrieving a connector identifier associated with the e-mail access protocol of each Internet e-mail account, and wherein the instantiated connector object corresponds to the connector identifier.

10. The method of claim 8, wherein invoking includes storing each of the e-mail messages downloaded from each Internet mail account in a mail queue with format identification data identifying a message format of each downloaded e-mail message.

11. The method of claim 10, further comprising:

selecting, for each downloaded e-mail message in the mail queue, a mail deliverer object corresponding to a message format identified by the message format data of each downloaded e-mail message; and

invoking the mail deliverer object for each downloaded e-mail message to deliver each downloaded e-mail message to the mail server on the local area network.

12. The method of claim 8, further comprising obtaining a thread for each of the Internet e-mail accounts, and wherein the acts of instantiating and invoking for each Internet e-mail account are performed within the thread for each Internet e-mail account.

13. An Internet email bridge comprising:

a processor

a computer-readable storage medium operationally coupled to the processor and storing computer executable instructions, the computer executable instructions, when executed by the processor, implement components comprising;

a mail manager for managing email messages from a plurality of Internet email servers, each operating in accordance with a different email access protocol;

a plurality of mail connector objects, instantiated and invoked by the mail manager, each of a mail connector class having logic for downloading email messages according to an associated email protocol, wherein the plurality of mail connector objects comprises;

a first e-mail connector object supporting a first e-mail access protocol; and

a second e-mail connector object supporting a second e-mail access protocol, where in the second e-mail access protocol is different from the first e-mail access protocol; and

a plurality of mail deliverer objects, instantiated and invoked by the mail manager, each of a mail deliverer class having logic for delivering the downloaded email messages to a local mail server of a local area network, wherein the plurality of mail deliverer objects comprises;

a first e-mail deliverer object supporting the first e-mail access protocol; and

a second e-mail deliverer object supporting the second e-mail access protocol.

14. The Internet email bridge of claim 13, further comprising a mail queue for temporarily storing messages prior to delivery to the local mail server, each message stored in the mail queue includes data identifying the protocol used for downloading the message.

15. The Internet email bridge of claim 13, each of the mail deliverer objects contains format-specific logic such that each mail deliverer object is an instance of a mail deliverer class that defines a method of delivering a message in a specific message format to the local mail server.

16. The Internet email bridge of claim 13, further comprising an account information store for storing account information for email accounts at the Internet email servers, and an account information module for managing and retrieving account information from the account information store.

17. The Internet email bridge of claim 16, further comprising:

a bridge service for implementing a connector schedule for downloading and delivering email messages from the plurality of Internet email servers;

a mail download manager, instantiated by the bridge service, for reading the account information from the account information store, and instantiating a mail connector object for downloading email messages from that account; and

a mail delivery manager, initialized by the bridge service, to instantiate a mail deliverer object for each delivery format type of the downloaded messages.

18. The Internet email bridge of claim 17, the mail delivery manager instantiates a mail deliverer object that contains logic for converting an email message in a non-compatible format into a compatible format for delivery to the local mail server.

19. The Internet email bridge of claim 17, the different email access protocols including POP and WebDav, and the delivery format types including XML and IMF.