comparison tests, the subaddress parameter, the &*copy*&, &*envelope*&,
&*fileinto*&, &*notify*&, and &*vacation*& extensions, but not the &*reject*&
extension.
-.new
Exim did not support message delivery notifications (MDNs) when Sieve handling
was introduced, so &*reject*& (which need them) could not be supported.
-.wen
In order for Sieve to work properly in Exim, the system administrator needs to
make some adjustments to the Exim configuration. These are described in the