Download of current portions of email messages

摘要

In general, this disclosure describes techniques of enabling devices to download only current portions of email messages without downloading historical portions of the email messages. For instance, when an email client generates a reply email message to an original email message, the reply email message includes a current portion and a historical portion. The current portion of the reply email message includes new information and the historical portion of the reply email message includes the original email message. The techniques of this disclosure enable devices to download the current portions of email messages without downloading the historical portions of the email messages.

主权项

1. A method comprising:
receiving, by a server, a second email message that is a child email message of a first email message, the second email message including a current portion and a historical portion, the current portion containing content not in the first email message, and the historical portion containing a copy of the first email message; determining, by the server, that the second email message includes a portion partition header field that identifies a start of the historical portion of the second email message, wherein the portion partition header field indicating one or more of: a number of bytes in the current portion of the second email message and a number of bytes in the historical portion of the second email message; after determining that the second email message includes the portion partition header field and that the portion partition header field identifies the start of the historical portion of the second email message, generating, by the server, a truncated email message that includes the current portion of the second email message and excludes the historical portion of the second email message, the current portion of the second email message including content in the second email message up to the start of the historical portion of the second email message; and transmitting the truncated email message.