I would like to use an Exim filter file to create a newsletter: accepting mail from specified contributor addresses, then forwarding on to specified subscriber addresses. The below works, but is there a more elegant and robust approach?
# Exim filter
if
$reply_address contains "eric@i.com" or
$reply_address contains "graham@c.com"
then
seen
deliver john@c.com
deliver michael@p.com
deliver terry@gj.com
endif
Using a sender address to determine recipients is unusual. I would just an alias file. You could base it off the system alias router:
exim.conf
system_aliases:
driver = redirect
allow_fail
allow_defer
data = ${lookup{$local_part}lsearch{/etc/aliases}}
file_transport = address_file
pipe_transport = address_pipe
/etc/aliases
mailinglist: john@c.com, michael@p.com, terry@gj.com
Use this configuration to maintain your mailing lists in a single file, one address per line.
exim.conf
# append "mailinglist" to local domains so that "mailinglist" is
# recognized as a domain we handle. Alternatively, you could just
# use your own domain and not bother with this
domainlist local_domains = @ : localhost : localhost.localdomain : mydomain.com : mailinglist
...
begin routers
...
mailing_lists:
driver = redirect
domains = mailinglist
no_more
file = /etc/exim/mailinglists/$local_part
no_check_local_user
forbid_pipe
forbid_file
errors_to = myusername@mydomain.net
/etc/exim/mailinglists/list01
john@c.com
michael@p.com
terry@gj.com
send test message to mailinglist "list01"
echo body | mail -s Test list01@mailinglist