From: Nigel Metheringham <Nigel.Metheringham@ThePLAnet.net>
Date: Wed, 23 Dec 1998 09:30:11 +0000

If I have a situation where a site I MX for has a known outage I stash all
their mail into a directory in BSMTP format.  This is how I do it -
another way would be to use a router rather than a director to do this....

 EXICONF_DIR    = /var/exim
 HELD_DOMDB     = EXICONF_DIR/held_domains.cdb
 HELD_DOMAINS   = cdb;HELD_DOMDB
 LOCAL_DOMAINS  = ...:HELD_DOMAINS:...
 local_domains  = LOCAL_DOMAINS

 #
 # held_domain transport
 # ~~~~~~~~~~~~~~~~~~~~~
 #
 # This is a transport used to stash held mail into.
 # Its basically a BSMTP maildir setup.

 held_domain:
  driver = appendfile
  directory = /var/spool/mail/held_domains/${lc:$domain}
  maildir_format
  user = exim
  group = exim
  mode = 0640
  create_directory
  bsmtp = domain
  prefix = ""
  suffix = ""
  no_from_hack

.... 

 #
 # held_domains director
 # ~~~~~~~~~~~~~~~~~~~~~
 #
 # Handles domains that are broken in some way so we hold mail
 # for them in a bsmtp mail queue
 #
 held_domains:
  domains = "HELD_DOMAINS"
  driver = smartuser
  transport = held_domain

When the outage is over I then knock the entry out of the held domains
cdb, and then cat all the BSMTP files into exim -bS (probably with a few
extra options to make it route and queue them).

This keeps our queues manageable and prevents piles of extra delay messages
being sent out.