Sieve Email Filtering: Date and Index Extensions, July 2008
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This document describes the "date" and "index" extensions to the Sieve email filtering language. The "date" extension gives Sieve the ability to test date and time values in various ways. The "index" extension provides a means to limit header and address tests to specific instances of header fields when header fields are repeated. [STANDARDS-TRACK]
For the definition of Status, see RFC 2026.
For the definition of Stream, see RFC 8729.