Email server with proxy caching of message identifiers and related methods

• US 20070073815A1
• Filed: 09/27/2005
• Published: 03/29/2007
• Est. Priority Date: 09/27/2005
• Status: Abandoned Application

• Current Assignee: Malikie Innovations Limited (Key Patent Innovations Limited)
• Original Assignee: TeamOn Systems Incorporated (Blackberry Limited)
• Inventors: Clarke, David, Kamat, Harshad
• Application Number:
  US11/236,349
• Publication Number:
  US 20070073815A1
• Time in Patent Office: Days
• US Class Current: 709/206
• CPC Class Codes: H04L 51/214 using selective forwarding
• CPC Class Codes: H04L 51/42 Mailbox-related aspects, e.g. synchronisation of mailboxes
• CPC Class Codes: H04L 51/58 Message adaptation for wireless communication

Abstract

An electronic (email server) includes a proxy that obtains mappings for UID'"'"'s, a cache in which the mappings of new UID'"'"'s and message ID'"'"'s are cached, and a proxy operative for receiving at least one of a Get, Delete or Move request for a MsgID that has not been cached and mapping the MsgID and “n” number of other MsgID'"'"'s around the MsgID that had not been cached.

Claims

1. An electronic mail (email) server comprising:

a proxy that obtains mappings for new unique identifiers (UID'"'"'s) corresponding to new electronic messages that had been determined from polling an electronic mailbox; and

a cache in which mappings for the new UID'"'"'s of the electronic message are cached, wherein the proxy is operative for receiving at least one of a Get, Delete or Move request for a Message Identifier (MsgId) that had not been cached, and mapping the MsgId and “

n”

number of other MsgId'"'"'s around the MsgId that had not been cached.

2. The email server according to claim 1, wherein said proxy is operative for caching the MsgId and the “

n”

number of other MsgId'"'"'s.

3. The email server according to claim 2, wherein “

n”

is a number between about 10 and about 100.

4. The email server according to claim 1, wherein said proxy is operative for maintaining the number of cached mappings of MsgId'"'"'s to below a predetermined number.

5. The email server according to claim 4, wherein said proxy is operative for clearing the cache if the number of cached mappings of MsgId'"'"'s exceeds a predetermined number.

6. The email server according to claim 1, and further comprising a database for storing UID'"'"'s and MsgId'"'"'s.

7. The email server according to claim 1, and further comprising a polling engine for polling an electronic mailbox for retrieving and storing UID'"'"'s within the database.

8. A communications system comprising:

a polling engine that polls an electronic mailbox of a user to retrieve unique identifiers (UID'"'"'s) and message identifiers (MsgId'"'"'s) of electronic messages;

a database for storing the UID'"'"'s and MsgID'"'"'s from the polling;

at least one cache in which mappings for new UID'"'"'s from the database are cached; and

an email proxy server that obtains mappings from the database for new UID'"'"'s of electronic messages based on polling, wherein the proxy is operative for receiving one of a Get, Delete or Move request for a MsgId that had not been cached and mapping the MsgId and “

n”

number of other MsgId'"'"'s around the MsgId that has not been cached.

9. The communications system according to claim 8, wherein said email proxy server is operative for caching the MsgId and the “

n”

number of other MsgId'"'"'s.

10. The communications system according to claim 8, wherein “

n”

is a number between about 10 and about 100.

11. The communications system according to claim 8, wherein said email proxy server is operative for maintaining the number of cached mappings of MsgId'"'"'s to below a predetermined number.

12. The communications system according to claim 11, wherein said email proxy server is operative for clearing the cache if the number of cached mappings of MsgId'"'"'s exceeds a predetermined number.

13. An electronic mail (email) processing method, which comprises:

polling an electronic mailbox to retrieve unique identifiers (UID'"'"'s) of electronic messages and mapping those UID'"'"'s that are new;

caching the new UID mappings into a cache;

receiving one of a Get, Delete or Move request for a Message Identifier (MsgId) that has not been cached; and

mapping the MsgId and “

n”

number of other MsgId'"'"'s around the MsgId that had not been cached.

14. A method according to claim 13, which further comprises caching the MsgId and the “

n”

number of other MsgId'"'"'s.

15. A method according to claim 13, wherein “

n”

is a number between about 10 and about 100.

16. A method according to claim 13, which further comprises maintaining the number of cached mappings to below a predetermined number.

17. A method according to claim 16, which further comprises clearing the cache if the number of cached mappings of MsgId'"'"'s exceeds a predetermined number.

18. A method according to claim 13, which further comprises storing UID'"'"'s and MsgId'"'"'s within a database.

19. A method according to claim 13, which further comprises deleting from memory the UID'"'"'s that had been cached after polling.

20. A computer-readable medium having computer-executable modules comprising:

a proxy that obtains mappings for new unique identifiers (UID'"'"'s) of electronic messages that had been determined from polling an electronic mailbox; and

a cache that stores the mappings of new UID'"'"'s, wherein the proxy is operative for receiving one of a Get, Delete or Move request for a Message Identifier (MsgId) that has not been cached, and mapping the MsgId and “

n”

number of other MsgId'"'"'s around the MsgId that had not been cached.