Hi Philip,
On Tue, Jul 24, 2001 at 09:09:30AM +0100, Philip Hazel penned:
> On Mon, 23 Jul 2001, Kevin Sindhu wrote:
>
> > From a developers standpoint, it makes sense fixing (if there is) any
> > problem with inetd/exim working. However, IMO, nothing as important such
> > a MTA should be run out of inetd anyway(But that's my opinion).
> >
> > I can certainly check to see if this is reproducable on Net/OpenBSD. I
> > do not run any linux so its hard for me to comment on.
>
> Please do the check if you have the time. Thanks.
I am unable to reproduce this on NetBSD-current (Details below). I am
also attaching the exim.conf/configure used to test this. I modified it
slightly from what Hanaski sent me and have tried to supply as much
details as possible, as well as tried to replicate Hanaski's environment. I am
pretty sure that the results should be similar on OpenBSD as well.
Rgds
-Kevin S.
-------------------------------------
--Test: Check to make sure exim does not relay when run from inetd
--System:
NetBSD lucifer 1.5W NetBSD 1.5W (Devil's Minion) #16: Sat Jul
14 08:19:16 PDT 2001 kevin@lucifer:/usr/src/sys/arch/i386/compile/LUCIFER i386
--Environment:
Exim.bin located in /home/kevin/exim-test dir hier.
/etc/services:
exim-smtp 2525/tcp #Testing with exim
exim-smtp 2525/udp #Testing with exim
/etc/inetd.conf:
exim-smtp stream tcp nowait root
/home/kevin/exim-test/bin/exim /home/kevin/exim-test/bin/exim -bs -oX
2525
--Relaying-session:
Connected to 192.9.200.151.
Escape character is '^]'.
220 lucifer.x-y.ca ESMTP Exim 3.22 #1 Tue, 24 Jul 2001 11:28:06 -0700
mail from: x@x
250 <x@x> is syntactically correct
rcpt to:kevin@???
550 relaying to <kevin@???> prohibited by administrator (failed to find h
ost name from IP address)
rcpt to: fake@???
550 relaying to <fake@???> prohibited by administrator
(failed to find host name from IP address)
^]
telnet> q
Connection closed.
--Logs:
Mainlog:
2001-07-24 11:28:19 refused relay (host) to <kevin@???>
from <x@x> H=[192.9.200.67] (failed to find host name from IP address)
2001-07-24 11:28:39 refused relay (host) to <fake@???> from
<x@x> H=[192.9.200.67] (failed to find host name from IP address)
2001-07-24 11:28:41 unexpected disconnection while reading SMTP command
from [192.9.200.67]
Rejectlog:
------------------------------------------------------------------------------
2001-07-24 11:28:19 refused relay (host) to <kevin@???> from
<x@x> H=[192.9.200.67] (failed to find host name from IP address)
------------------------------------------------------------------------------
2001-07-24 11:28:39 refused relay (host) to <fake@???> from
<x@x> H=[192.9.200.67] (failed to find host name from IP address)
------------------------------------------------------------------------------
Exim Configure :
Attached
# This is the main exim configuration file.
# It was originally generated by `eximconfig', part of the exim package
# distributed with Debian, but it may edited by the mail system administrator.
# This file originally generated by eximconfig at Sat Feb 24 02:34:08 CST 2001
# See exim info section for details of the things that can be configured here.
# Please see the manual for a complete list
# of all the runtime configuration options that can be included in a
# configuration file.
# This file is divided into several parts, all but the last of which are
# terminated by a line containing the word "end". The parts must appear
# in the correct order, and all must be present (even if some of them are
# in fact empty). Blank lines, and lines starting with # are ignored.
######################################################################
# MAIN CONFIGURATION SETTINGS #
######################################################################
# Specify the domain you want to be added to all unqualified addresses
# here. Unqualified addresses are accepted only from local callers by
# default. See the receiver_unqualified_{hosts,nets} options if you want
# to permit unqualified addresses from remote sources. If this option is
# not set, the primary_hostname value is used for qualification.
qualify_domain = lucifer.x-y.ca
# If you want unqualified recipient addresses to be qualified with a different
# domain to unqualified sender addresses, specify the recipient domain here.
# If this option is not set, the qualify_domain value is used.
# qualify_recipient =
# Specify your local domains as a colon-separated list here. If this option
# is not set (i.e. not mentioned in the configuration file), the
# qualify_recipient value is used as the only local domain. If you do not want
# to do any local deliveries, uncomment the following line, but do not supply
# any data for it. This sets local_domains to an empty string, which is not
# the same as not mentioning it at all. An empty string specifies that there
# are no local domains; not setting it at all causes the default value (the
# setting of qualify_recipient) to be used.
local_domains = lucifer.x-y.ca
# Allow mail addressed to our hostname, or to our IP address.
#local_domains_include_host = true
local_domains_include_host_literals = true
forbid_domain_literals
# Domains we relay for; that is domains that aren't considered local but we
# accept mail for them.
relay_domains = lucifer.x-y.ca
# If this is uncommented, we accept and relay mail for all domains we are
# in the DNS as an MX for.
relay_domains_include_local_mx = false
# No local deliveries will ever be run under the uids of these users (a colon-
# separated list). An attempt to do so gets changed so that it runs under the
# uid of "nobody" instead. This is a paranoic safety catch. Note the default
# setting means you cannot deliver mail addressed to root as if it were a
# normal user. This isn't usually a problem, as most sites have an alias for
# root that redirects such mail to a human administrator.
# However, you chose not to have such an alias, so this is commented out
#never_users = root
# The setting below causes Exim to do a reverse DNS lookup on all incoming
# IP calls, in order to get the true host name. If you feel this is too
# expensive, you can specify the networks for which a lookup is done, or
# remove the setting entirely.
host_lookup = *
# The setting below would, if uncommented, cause Exim to check the syntax of
# all the headers that are supposed to contain email addresses (To:, From:,
# etc). This reduces the level of bounced bounces considerably.
headers_check_syntax
# Exim contains support for the Realtime Blocking List (RBL) that is being
# maintained as part of the DNS. See
http://maps.vix.com/rbl/ for
# background. Uncommenting the following line will make Exim reject mail
# from any host whose IP address is blacklisted in the RBL at maps.vix.com.
rbl_domains = rbl.maps.vix.com
rbl_reject_recipients = true
rbl_warn_header = true
# The setting below allows your host to be used as a mail relay only by
# localhost: it locks out the use of your host as a mail relay by any
# other host. See the section of the manual entitled "Control of relaying"
# for more info.
host_auth_accept_relay =
host_accept_relay =
# If you want Exim to support the "percent hack" for all your local domains,
# uncomment the following line. This is the feature by which mail addressed
# to x%y@z (where z is one of your local domains) is locally rerouted to
# x@y and sent on. Otherwise x%y is treated as an ordinary local part
# percent_hack_domains=*
# If this option is set, then any process that is running as one of the
# listed users may pass a message to Exim and specify the sender's
# address using the "-f" command line option, without Exim's adding a
# "Sender" header.
#trusted_users = mail
# If this option is true, the SMTP command VRFY is supported on incoming
# SMTP connections; otherwise it is not.
smtp_verify = false
# Some operating systems use the "gecos" field in the system password file
# to hold other information in addition to users' real names. Exim looks up
# this field when it is creating "sender" and "from" headers. If these options
# are set, exim uses "gecos_pattern" to parse the gecos field, and then
# expands "gecos_name" as the user's name. $1 etc refer to sub-fields matched
# by the pattern.
#gecos_pattern = ^([^,:]*)
#gecos_name = $1
# This sets the maximum number of messages that will be accepted in one
# connection. The default is 10, which is probably enough for most purposes,
# but is too low on dialup SMTP systems, which often have many more mails
# queued for them when they connect.
smtp_accept_queue_per_connection = 100
# Send a mail to the postmaster when a message is frozen. There are many
# reasons this could happen; one is if exim cannot deliver a mail with no
# return address (normally a bounce) another that may be common on dialup
# systems is if a DNS lookup of a smarthost fails. Read the documentation
# for more details: you might like to look at the auto_thaw option
freeze_tell_mailmaster = true
# This string defines the contents of the \`Received' message header that
# is added to each message, except for the timestamp, which is automatically
# added on at the end, preceded by a semicolon. The string is expanded each
# time it is used.
received_header_text = "Received: \
${if def:sender_rcvhost {from ${sender_rcvhost}\n\t}\
{${if def:sender_ident {from ${sender_ident} }}\
${if def:sender_helo_name {(helo=${sender_helo_name})\n\t}}}}\
by ${primary_hostname} \
${if def:received_protocol {with ${received_protocol}}} \
(Exim ${version_number} #${compile_number} (NetBSD-current))\n\t\
id ${message_id}\
${if def:received_for {\n\tfor <$received_for>}}"
# When Exim can neither deliver a message nor return it to sender, it "freezes"
# the delivery error message (aka "bounce message"). There are also other
# circumstances in which messages get frozen. They will stay on the queue for
# ever unless one of the following options is set.
# This option unfreezes unfreezes bounce messages after two days, tries
# once more to deliver them, and ignores any delivery failures.
ignore_errmsg_errors_after = 1d
# This option cancels (removes) frozen messages that are older than a week.
timeout_frozen_after = 2d
end
######################################################################
# TRANSPORTS CONFIGURATION #
######################################################################
# ORDER DOES NOT MATTER #
# Only one appropriate transport is called for each delivery. #
######################################################################
# This transport is used for local delivery to user mailboxes. On debian
# systems group mail is used so we can write to the /var/spool/mail
# directory. (The alternative, which most other unixes use, is to deliver
# as the user's own group, into a sticky-bitted directory)
local_delivery:
driver = appendfile
group = mail
mode = 0660
mode_fail_narrower = false
envelope_to_add = true
directory = ${home}/Maildir
maildir_format = true
maildir_tag = ,S=$message_size
quota_size_regex = S=(\d+)$
# file = /var/spool/mail/${local_part}
# This transport is used for handling pipe addresses generated by
# alias or .forward files. If the pipe generates any standard output,
# it is returned to the sender of the message as a delivery error. Set
# return_fail_output instead if you want this to happen only when the
# pipe fails to complete normally.
address_pipe:
driver = pipe
return_output
# This transport is used for handling file addresses generated by alias
# or .forward files.
address_file:
driver = appendfile
# This transport is used for handling file addresses generated by alias
# or .forward files if the path ends in "/", which causes it to be treated
# as a directory name rather than a file name. Each message is then delivered
# to a unique file in the directory. If instead you want all such deliveries to
# be in the "maildir" format that is used by some other mail software,
# uncomment the final option below. If this is done, the directory specified
# in the .forward or alias file is the base maildir directory.
#
# Should you want to be able to specify either maildir or non-maildir
# directory-style deliveries, then you must set up yet another transport,
# called address_directory2. This is used if the path ends in "//" so should
# be the one used for maildir, as the double slash suggests another level
# of directory. In the absence of address_directory2, paths ending in //
# are passed to address_directory.
address_directory:
driver = appendfile
no_from_hack
check_string = ""
prefix = ""
suffix = ""
maildir_format = true
# This transport is used for handling autoreplies generated by the filtering
# option of the forwardfile director.
address_reply:
driver = autoreply
# This transport is used for procmail
procmail_pipe:
driver = pipe
command = "/usr/pkg/bin/procmail -d ${local_part}"
return_path_add
delivery_date_add
envelope_to_add
check_string = "From "
escape_string = ">From "
user = $local_part
group = mail
# This transport is used for delivering messages over SMTP connections.
remote_smtp:
driver = smtp
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. #
######################################################################
# This allows local delivery to be forced, avoiding alias files and
# forwarding.
real_local:
prefix = real-
driver = localuser
transport = local_delivery
# This director handles aliasing using a traditional /etc/aliases file.
# If any of your aliases expand to pipes or files, you will need to set
# up a user and a group for these deliveries to run under. You can do
# this by uncommenting the "user" option below (changing the user name
# as appropriate) and adding a "group" option if necessary.
system_aliases:
driver = aliasfile
file_transport = address_file
pipe_transport = address_pipe
file = /etc/mail/aliases
search_type = lsearch
# user = list
# Uncomment the above line if you are running smartlist
# This director runs procmail for users who have a .procmailrc file
procmail:
driver = localuser
transport = procmail_pipe
require_files = ${local_part}:+${home}:+${home}/.procmailrc:+/usr/pkg/bin/procmail
no_verify
# This director handles forwarding using traditional .forward files.
# It also allows mail filtering when a forward file starts with the
# string "# Exim filter": to disable filtering, uncomment the "filter"
# option. The check_ancestor option means that if the forward file
# generates an address that is an ancestor of the current one, the
# current one gets passed on instead. This covers the case where A is
# aliased to B and B has a .forward file pointing to A.
# For standard debian setup of one group per user, it is acceptable---normal
# even---for .forward to be group writable. If you have everyone in one
# group, you should comment out the "modemask" line. Without it, the exim
# default of 022 will apply, which is probably what you want.
userforward:
driver = forwardfile
file_transport = address_file
pipe_transport = address_pipe
reply_transport = address_reply
no_verify
check_ancestor
file = .forward
modemask = 002
filter
# This director matches local user mailboxes.
localuser:
driver = localuser
transport = local_delivery
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. #
######################################################################
# Remote addresses are those with a domain that does not match any item
# in the "local_domains" setting above.
# This router routes to remote hosts over SMTP using a DNS lookup with
# default options.
lookuphost:
driver = lookuphost
transport = remote_smtp
# This router routes to remote hosts over SMTP by explicit IP address,
# given as a "domain literal" in the form [nnn.nnn.nnn.nnn]. The RFCs
# require this facility, which is why it is enabled by default in Exim.
# If you want to lock it out, set forbid_domain_literals in the main
# configuration section above.
literal:
driver = ipliteral
transport = remote_smtp
# Send all mail to a smarthost
#smarthost:
# driver = domainlist
# transport = remote_smtp
# route_list = "* portal.hanaden.com bydns_a"
end
######################################################################
# RETRY CONFIGURATION #
######################################################################
# This single retry rule applies to all domains and all errors. It specifies
# retries every 15 minutes for 2 hours, then increasing retry intervals,
# starting at 2 hours and increasing each time by a factor of 1.5, up to 16
# hours, then retries every 8 hours until 4 days have passed since the first
# failed delivery.
# Domain Error Retries
# ------ ----- -------
* * F,2h,15m; G,16h,2h,1.5; F,4d,8h
end
######################################################################
# REWRITE CONFIGURATION #
######################################################################
# There are no rewriting specifications in this default configuration file.
# This rewriting rule is particularly useful for dialup users who
# don't have their own domain, but could be useful for anyone.
# It looks up the real address of all local users in a file
#*@portal ${lookup{$1}lsearch{/etc/email-addresses}\
# {$value}fail} bcfrF
end
######################################################################
# AUTH CONFIGURATION #
######################################################################
# $2 = user name : $3 password
#plain:
# driver = plaintext
# public_name = PLAIN
# server_condition = "${if pam{$2:$3}{1}{0}}"
# server_set_id = $2
#login:
# driver = plaintext
# public_name = LOGIN
# server_prompts = "Username:: : Password::"
# server_condition = "${if pam{$1:$2}{1}{0}}"
# server_set_id = $1
end
