Backup and Archive Incoming Email with Exim

Loitering around Google and finding a way to archive/backup incoming email in Exim email server. I went through the documentation in Exim offical website and found out a solution to do that with $tod_log, substr and shadow_transport.

The below transport rule will backup copy of email into /mail/backup/datetime/domainname/userid


save_incoming_email:
  driver = appendfile
  file = /mail/backup/${substr_0_10:$tod_log}/$domain/$local_part
  delivery_date_add
  envelope_to_add
  return_path_add
  group = paulooieximing
  user = paulooieximing

local_delivery:
  driver = appendfile
  file = /mail/$domain/$local_part/inbox
  create_directory
  delivery_date_add
  envelope_to_add
  return_path_add
  group = paulooieximing
  user = paulooieximing
  shadow_transport = save_incoming_email

This rules will backup all incoming email in local_delivery router. For you information;


$local_part = email userid
$domain = domain name
$tod_log = date time for log files
${substr_0_10:$tod_log} = substring 10 char for date "2006-07-01"

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