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Caching email unique identifiers

  • US 8,326,932 B2
  • Filed: 02/19/2010
  • Issued: 12/04/2012
  • Est. Priority Date: 02/20/2009
  • Status: Active Grant
First Claim
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1. An electronic mail processing system comprising:

  • at least one processor;

    at least one computer-readable medium in communication with the at least one processor; and

    at least one electronic mail processing module;

    residing on the medium, andcomprising instructions, that upon execution by the at least one processor to are operative to;

    store, in a database assigned to a first direct access proxy, a list of electronic mail message unique identifiers (UIDs) identifying a plurality of messages,the messages associated with a device, the device assigned to the first direct access proxy;

    store the list in a cache,receive, in the direct access proxy, a query directed to UIDs of the device;

    determine that the database is unavailable due to database downtime;

    determine that the device has not been assigned to a subsequent direct access proxy; and

    respond to the query using the cache.

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