I have been building a surreal virtual system over the past while, and
I would love any feedback on how to make things run "better" or
whatever.
On the other hand, if the strange things I have done are any use to
those reading the list or a future mail archive - welcome.
Notes: The mailing list stuff and majordomo are leftovers and are not
live; comments on a retry policy would be welcome... defaults appears
OK to me. Comments to increasing reliablitiy / security also.
In case it is too surreal (it does work) the idea is that mail for
user@??? ->
/u/abc/abc001/domains/example.com/mail/boxes/user/INBOX
in mbx format (for heavily hacked UWash IMAP to get to)
and
user+mailbox@??? ->
/u/abc/abc001/domains/example.com/mail/boxes/user/mailbox
I am worried by the later "+mailbox" extension in the case of idiot
kiddies mailing to user+../../doh@??? etc. How can I filter
these types of patterns "trivially" ?
Hmm, I have added a thought to the file below - note that the IMAP
seperator is hacked to be '+' and not '/' - so filtering '/' should
be fine :)
All mailboxes in a domain are owned by the same users - who owns the
domain. (abc001 in this case).
One thing in particular; if a domain owner sets up an alias file
which contains "* somewhere@???" to forward all mail, is
there anyway I can give exceptions *without* using another file and
still use smartuser to drop usernames through ?
Let me try that again: If I want to deliver sales@??? to a
local mailbox, but everything else to be forwarded, can I do this in
one "alias" style file ?
TIA to all who got this far in reading - here's the file.
######################################################################
# MAIN CONFIGURATION SETTINGS #
######################################################################
#
# Macros
#
EXIM_HOME = /etc/exim
EXIM_DB = EXIM_HOME/db
MATCH_PLUS = match{$local_part}{^([^+]+)\\+(.*)\$}
#
# is this better ?
# MATCH_PLUS = match{$local_part}{^([^+]+)\\+([^/]+)\$}
#
MATCH_LOCAL = ${if MATCH_PLUS {$1}{$local_part}}
MATCH_MAILBOX = ${if MATCH_PLUS {$2}{INBOX}}
LOOKUP_USERNAME = ${lookup{$domain}dbm{EXIM_DB/localdomains.db}{$value}}
LOOKUP_PASSWD = ${lookup{LOOKUP_USERNAME}nis{passwd.byname}{$value}}
LOOKUP_USERDIR = ${extract{6}{:}{LOOKUP_PASSWD}}
LOOKUP_MAILDIR = LOOKUP_USERDIR/domains/$domain/mail
LOOKUP_BOXDIR = LOOKUP_MAILDIR/boxes/MATCH_LOCAL
LOOKUP_LISTDIR = LOOKUP_MAILDIR/lists
exim_user = "exim"
exim_group = "mail"
######
primary_hostname = knowledge.com
forbid_domain_literals
local_domains = dbm;EXIM_DB/localdomains.db
never_users = root
trusted_groups = wheel
host_lookup = 0.0.0.0/0
#receiver_verify
sender_verify
# rbl_domains = rbl.maps.vix.com:dul.maps.vix.com:relays.orbs.org
remote_max_parallel = 10
ignore_errmsg_errors
rfc1413_query_timeout = 5s
finduser_retries = 10
log_file_path = /var/spool/exim/log/%s.log
smtp_verify = true
smtp_expn_hosts = localhost
end
######################################################################
# TRANSPORTS CONFIGURATION #
######################################################################
# ORDER DOES NOT MATTER #
# Only one appropriate transport is called for each delivery. #
######################################################################
remote_smtp:
driver = smtp
local_delivery:
driver = appendfile
file = LOOKUP_BOXDIR/MATCH_MAILBOX
delivery_date_add
envelope_to_add
return_path_add
from_hack
mbx_format
address_pipe:
driver = pipe
return_output
address_file:
driver = appendfile
current_directory = LOOKUP_BOXDIR
delivery_date_add
envelope_to_add
return_path_add
mbx_format
address_reply:
driver = autoreply
majordomo_pipe:
driver = pipe
return_output
path = EXIM_HOME/majordomo
home_directory = LOOKUP_LISTDIR
end
######################################################################
# DIRECTORS CONFIGURATION #
# Specifies how local addresses are handled #
######################################################################
# ORDER DOES MATTER #
# A local address is passed to each in turn until it is accepted. #
######################################################################
#
# Match domain specific aliases in aliases.db in each directory
#
domain_aliases:
driver = aliasfile
optional
qualify_preserve_domain
file = LOOKUP_MAILDIR/aliases
search_type = lsearch*
skip_syntax_errors
syntax_errors_to = postmaster@$domain
errors_to = postmaster@$domain
user = LOOKUP_USERNAME
group = LOOKUP_USERNAME
lists_aliases:
driver = aliasfile
condition = 0
optional
qualify_preserve_domain
file = LOOKUP_MAILDIR/lists.db
search_type = dbm
skip_syntax_errors
syntax_errors_to = list-owner@$domain
errors_to = list-owner@$domain
pipe_transport = majordomo_pipe
user = LOOKUP_USERNAME
group = LOOKUP_USERNAME
lists_private:
driver = aliasfile
optional
qualify_preserve_domain
file = LOOKUP_MAILDIR/lists-private.db
search_type = dbm
condition = 0
# condition = "${if eq {$received_protocol}{local} \
# {${if eq {$sender_ident}{exim} \
# {true}{false}}}{false}}"
user = LOOKUP_USERNAME
group = LOOKUP_USERNAME
userforward:
driver = forwardfile
home_directory = LOOKUP_BOXDIR
file_directory = LOOKUP_BOXDIR
file = LOOKUP_BOXDIR/.forward
check_local_user = false
check_ancestor
filter
file_transport = address_file
pipe_transport = address_pipe
reply_transport = address_reply
user = LOOKUP_USERNAME
group = LOOKUP_USERNAME
localuser:
driver = smartuser
transport = local_delivery
condition = ${lookup {MATCH_LOCAL} lsearch {LOOKUP_MAILDIR/passwd} {1} {0}}
user = LOOKUP_USERNAME
group = LOOKUP_USERNAME
end
######################################################################
# ROUTERS CONFIGURATION #
# Specifies how remote addresses are handled #
######################################################################
# ORDER DOES MATTER #
# A remote address is passed to each in turn until it is accepted. #
######################################################################
lookuphost:
driver = lookuphost
transport = remote_smtp
end
######################################################################
# RETRY CONFIGURATION #
######################################################################
# Domain Error Retries
# ------ ----- -------
* * F,2h,15m; G,16h,1h,1.5; F,4d,8h
end
######################################################################
# REWRITE CONFIGURATION #
######################################################################
--
Peter Galbavy
Knowledge Matters Ltd
http://www.knowledge.com/
