sent_messages:
#  driver = accept
  driver = redirect
#  transport = save_sent_messages
  unseen = yes
  user = Debian-exim
  allow_filter = yes
  local_part_suffix = +*
  local_part_suffix_optional = yes
  repeat_use = no
#  condition = ${if match {+local_domains}{domain:$sender_address_domain} {yes}{no} }
#  condition = yes
#  headers_remove = 
#  headers_add = X-Sent: Yes
  senders = !root@+local_domains : *@+local_domains
#  file = /etc/exim4/sent_messages.filter
  data = #Exim filter\n\
	unseen deliver $sender_address_local_part+Sent@$sender_address_domain