Clonehosts Channel Option

Clone messages to alternate destination
(New in MS 8.0) A commonly requested capability is to "clone" all messages that meet some criteria and send them to an alternate destination. This can be accomplished in a variety of ways, including the Sieve " " action, the    mapping, the    mapping,  and various sorts of address rewriting tricks, and all of these mechanisms have different characteristics as well as different advantages and disadvantages.

In the specific case when the desire is to clone all messages sent to a particular channel to another channel while preserving the initial address that expanded to that channel, none of the previously mentioned methods provide that specific result. (A  action  in a  destination channel Sieve script  can capture the message, but not the initial address.    has similar limitations and also requires playing queue management games.)

The  channel option provides this result. It accepts a single argument: A space-separated list of host names. When given a  setting of      and a message sent to the addresses   and  , both of which expanded to one or more final recipient addresses destined to that channel, this setting will add the recipient addresses: @host1:initial1 @host2:initial1 @host1:initial2 @host2:initial2

See also:
 * Sieve capture extension
 * MESSAGE-SAVE-COPY mapping table
 * FORWARD mapping table
 * destinationfilter Option
 * Addresses channel options
 * Gateway or firewall or mailhub channel options
 * Channel options