[exim] Deduplicate message copies

Hi

I have following router used to send messages to archive server.
Archive server can't recognise duplicated messages.

Is there any option to configure exim to send only one copy of message to
my.backup.server ?


mailarchive:
driver = manualroute
domains = *
transport = remote_smtp
route_list = * my.backup.server
self = send
unseen


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