CACHING EMAIL UNIQUE IDENTIFIERS

摘要

Accessing, via an end user device, email messages of an external mail source.
A direct access
proxy is operative to reconcile the email contents of external email sources
with the email
contents of user devices through the use of lists of unique email identifiers
(UIDs). A Partition
Database returns UID lists reflective of the UIDs of email messages previously
received from the
external email source and forwarded to a network server of the system
(forwarded UID lists). A
memory cache external to the direct access proxy and its corresponding
Partition Database
returns forwarded UID lists. The direct access proxy determines the data
reliability of the
Partition Database and memory cache, and obtains forwarded UID lists from the
memory cache
when it determines that the memory cache is at least as reliable as the
Partition Database.