Sieve capture extension

The MTA supports a private " " extension action (capability name " " -- but it may be used without explicitly listing it in a " " clause) for capturing a message copy for legal intercept, or archival, or message replay, or similar purposes. " " is a deprecated synonym for the " " action.

Two optional nonpositional parameters, " " and " ", were added for MS 6.3; " " (to generate Microsoft® Exchange "envelope journaling" format) was added for 7.0u2;  " " (which can be used as a modifier with either   or  ) was added for 8.0.

See Format of captured message copies for examples of these formats.

See Example Sieve external lists with properties for complex examples using " ".

See also:
 * Format of captured message copies
 * Example Sieve external lists with properties
 * Sieve supported extensions
 * Sieve filters