The Exim Sieve implementation offers the core as defined by RFC 3028,
comparison tests, the subaddress parameter, the &*copy*&, &*envelope*&,
&*fileinto*&, &*notify*&, and &*vacation*& extensions, but not the &*reject*&
extension. Exim does not support message delivery notifications (MDNs), so
adding it just to the Sieve filter (as required for &*reject*&) makes little
sense.
The Exim Sieve implementation offers the core as defined by RFC 3028,
comparison tests, the subaddress parameter, the &*copy*&, &*envelope*&,
&*fileinto*&, &*notify*&, and &*vacation*& extensions, but not the &*reject*&
extension. Exim does not support message delivery notifications (MDNs), so
adding it just to the Sieve filter (as required for &*reject*&) makes little
sense.