| 摘要 |
A system and method for improved client and server communications, more particularly, an improved protocol that may be used for communication betwee n a client and a server, such as in an email environment. Many features are provided for improved communications. An email server may provide the best message body available for an email message, may transfer an entire data object if requested property or properties are not well defined within the data object, may provide progress data for use in trackin g download progress, and may send error information for a data object having an error. Email changes may be optimized at an email server component, even if the email changes occurre d at another email server component. An email server may maintain a table of changes that occur to folders at an associated data store, and may notify a subscribed email client component of changes that occur in the table.
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