Smail3.1 seems to be a de-facto standard transport agent for uucp-only sites and for some smtp sites. It's easy to configure, it compiles without patching from the sources and it's fairly secure.
Install smail binary from your distribution (I recommand you choose this) or get smail sources and build smail. If you're building smail from sources, you need to have the following in your os/linux file so that 'sed' gives you shell scripts that work properly.
CASE_NO_NEWLINES=true
Once it's installed, config. files will certainly go in /etc/smail (but your mileage may vary if you use old distributions); let's start editing them !
# From
smart_path=polux
smart_transport=uux
# To
hostname=barberouge
domains=linux.lmm.com
visible_name=barberouge.linux.lmm.com
uucp_name=barberouge.linux.lmm.com
# max_message_size=512k
# auth_domains=foo.bar
# more_hostnames=barberouge.polux.freenix.fr
Well, first, who is feeding you ? I'm fed by "polux" via uucp (i.e. uux transport); naturally you need to change this file according to your own situation. For example, you could by fed by "bargw.bar.foobar.com" via "smtp", in that case you don't need a transport file and can define "-transport_file " to indicate you don't need one.
You can also use "postmaster_address = yourname", hide the network topology in outgoing addresses (if you're a gateway) using "visible_name", set which aliases address can also be used for the email you receive, using "more_hostnames".
See smail documentation for more details or the examples in /usr/doc/smail/examples to see if any match your situation.
# aliasinclude - expand ":include:filename" addresses produced by alias files
# This entry and the next one are pretty much boiler-plate. Reasons
# for making significant changes are few. The sole purpose of these
# is to match and expand addresses of the form:
# :include:pathname
# which may occur in alias files or mailing-list/forward files
# (produced by any director with a driver of forwardfile).
aliasinclude:
driver = aliasinclude, # use this special-case driver
nobody; # associate nobody user with addresses
# when mild permission violations
# are encountered
copysecure, # get permissions from alias director
copyowners, # get owners from alias director
# forwardinclude - expand ":include:filename" addrs produced by forward files
forwardinclude:
driver = forwardinclude, # use this special-case driver
nobody;
copysecure, # get perms from forwarding director
copyowners, # get owners from forwarding director
# aliases - search for alias expansions stored in a database
# This is the standard aliases file. It is used for generic things,
# like mapping root, postmaster, MAILER-DAEMON and uucp to site
# admins, creating some small system alias expansions, and such. In
# this site configuration, the aliases file is used mostly for
# machine-specific aliasing/forwarding information. Global forwarding
# information should be put in the "forward" database.
aliases:
driver=aliasfile, # general-purpose aliasing director
-nobody, # all addresses are associated
# with nobody by default, so setting
# this is not useful.
sender_okay, # don't remove sender from expansions
owner=owner-$user; # problems go to an owner address
file=/etc/aliases,
modemask=002, # should not be globally writable
optional, # ignore if file does not exist
proto=lsearch, # unsorted ASCII file
# forward - search for expansions stored in a forwarding database
# This is the subdomain-wide user forwarding database. Entries are
# maintained here for current or past users, to forward their mail to
# their preferred mail-reading machine. The forward database is
# shipped around the TCP/IP network as changes are made, to keep the
# network consistent.
#forward:
# driver = aliasfile, # general-purpose aliasing director
# -nobody, # all addresses are associated
# # with nobody by default, so setting
# # this is not useful.
# owner = real-$user; # problems go to an owner address
#
# file = /etc/forward,
# modemask = 002,
# proto = dbm, # use dbm(3X) library for access
# dotforward - expand .forward files in user home directories
# For users that have an entry in the "forward" database, a ".forward"
# file is only used if it is on the "home" machine, as identified in
# the forward database. If used, it is treated as a list of addresses
# to which mail should be delivered, rather than (or in addition to)
# the user identified in the local address.
dotforward:
driver = forwardfile, # general-purpose forwarding director
owner = postmaster, nobody, sender_okay;
file = ~/.forward, # .forward file in home directories
checkowner, # the user can own this file
owners = root, # or root can own the file
modemask = 002, # it should not be globally writable
caution = daemon:root, # don't run things as root or daemon
# be extra carefull of remotely accessible home directories
unsecure = "~uucp:/tmp:/usr/tmp:/var/tmp"
# forwardto - expand a "Forward to " in user mailbox files
# This emulates the V6/V7/System-V forwarding mechanism which uses a
# line of forward addresses stored at the beginning of user mailbox files
# prefixed with the string "Forward to "
forwardto:
driver = forwardfile,
owner = postmaster, nobody, sender_okay;
file = /var/spool/mail/${lc:user}, # point at user mailbox files
forwardto, # enable "Forward to " function
checkowner, # the user can own this file
owners = root, # or root can own the file
modemask = 0002, # under System V, group mail can write
caution = daemon:root # don't run things as root or daemon
# user - match users on the local host with delivery to their mailboxes
user: driver = user; # driver to match usernames
transport = local # local transport goes to mailboxes
# real_user - match usernames when prefixed with the string "real-"
# This is useful for allowing an address which explicitly delivers to a
# user's mailbox file. For example, errors in a .forward file expansion
# could be delivered here, or forwarding loops between multiple machines
# can be resolved by using a real-username address. Also, users that
# wish to use mail as a means of transferring data to a machine that
# is not their "home" machine can mail to real-login-name@remote.host.
real_user:
driver = user;
transport = local,
prefix = "real-" # for example, match real-root
# lists - expand mailing lists stored in a list directory
# mailing lists can be created simply by creating a file in the
# /etc/smail/lists directory.
lists: driver = forwardfile,
caution, # flag all addresses with caution
nobody, # and then associate the nobody user
owner = owner-$user; # system V sites may wish to use
# o-$user, as owner-$user may be
# too long for a 14-char filename.
file = lists/${lc:user} # lists is under $smail_lib_dir
# owners - expand mailing lists stored in a list owner directory
# mailing lists owner lists can be created simply by creating a file
# in the /etc/smail/lists/owner directory. Mailing list owners
# are sent locally generated errors dealing with a mailing list of the
# same name. To create an owner list for a mailing list, create a
# file with the name of the list in /etc/smail/lists/owner. This
# will create a list address of owner-listname, as is used by the
# "lists" director above.
owners: driver = forwardfile,
caution, # flag all addresses with caution
nobody, # and then associate the nobody user
owner = postmaster; # system V sites may wish to use
# o-$user, as owner-$user may be
# too long for a 14-char filename.
prefix = "owner-",
file = lists/owner/${lc:user} # lists is under $smail_lib_dir
# request - expand mailing lists stored in a list request directory
# mailing lists request lists can be created simply by creating a file
# in the /etc/smail/lists/request directory. Request addresses
# are typically used as a standard address for queries about a mailing
# list. For example, requests for additions or deletions to a list
# will generally be sent to "list-request", which should be set up to
# forward to the appropriate person or persons.
request: driver = forwardfile,
caution, # flag all addresses with caution
nobody, # and then associate the nobody user
owner = postmaster; # system V sites may wish to use
# o-$user, as owner-$user may be
# too long for a 14-char filename.
suffix = "-request",
file = lists/request/${lc:user} # lists is under $smail_lib_dir
You shouldn't need to change anything here, only mailing list options if you intend to run some using smail, or forwards options if, for example, you want to disable forwarding.
.f105.n324.z2.fidonet.org f105.n324.z2.fidonet.org!%s
.n324.z2.fidonet.org f105.n324.z2.fidonet.org!%s
.z2.fidonet.org f105.n324.z2.fidonet.org!%s
.fidonet.org f105.n324.z2.fidonet.org!%s
Create such a file only if you're using ifmail and FIDO.
# forces - force certain paths
# This database exists as a means of hardcoding the paths to various
# machines or domains. It is for use in creating temporary tweaks to
# the other routint databases. To change the database, edit the file
# maps/force.path and type "make" in the maps/ subdirectory.
forces:
driver = pathalias, # router to search paths file
method = /etc/smail/maps/table; # transports are in this file
file = forcepaths, # file containing force path info
proto = lsearch, # use the sorted path file
optional,
reopen # close when not being used
uucp_neighbors:
driver=uuname, # use a program which returns neighbors
transport=uux;
cmd="/usr/bin/uuname -a", # specifically, use the uuname program
# domain=uucp # strip ending ".uucp"
# smart_host - a partically specified smarthost director
# If the config file attribute smart_path is defined as a path from the
# local host to a remote host, then hostnames not matched otherwise will
# be sent off to the stated remote host. The config file attribute
# smart_transport can be used to specify a different transport.
# If the smart_path attribute is not defined, this router is ignored.
smart_host:
driver = smarthost, # special-case driver
transport = uux # by default deliver over UUCP
# path=phreak
# ifmail - to send mails to fidonet and vice versa
ifmail:
driver=pathalias,
transport=ifmail;
file=fidopaths,
proto=lsearch
You should only include ifmail chapter if you use ifmail for FIDO mails. Note you can also change transport mode from "uux" (ie UUCP) to, for example, "smtp" or even 'hardcode the paths to various machines or domains' in "/etc/smail/maps/table".
This is usefull if you want outgoing mail for your local network to be delivered immediately, since there's no need for it to be routed to your uucp connexion of your internet access.
# local - deliver mail to local users
# Tell smail to append directly to user mailbox files in the /var/spool/mail
# directory.
#local: driver = appendfile, # append message to a file
# -return_path, # include a Return-Path: field
# local, # use local forms for delivery
# from, # supply a From_ envelope line
# unix_from_hack; # insert > before From in body
#
# file = /var/spool/mail/${lc:user}, # use this location for Linux
# # Note, mail spool must be 1777
# file = ~/mailfile, # use this location for better security
# group = mail, # group to own file for System V
# mode = 0660, # under System V, group mail can access
# suffix = "\n", # append an extra newline
# append_as_user,
# This allows each user to have a ~/.procmailrc file to control filtering
# of mail and saving mail from mail lists in separate mailboxes if they wish.
local: +inet,
-uucp,
driver = pipe, # append message to a file
return_path, # include a Return-Path: field
local, # use local forms for delivery
from, # supply a From_ envelope line
unix_from_hack; # insert > before From in body
cmd = "/usr/bin/procmail", # use procmail for local delivery
parent_env, # environment info from parent addr
pipe_as_user, # use user-id associated with address
umask = 0022, # umask for child process
# -ignore_status, # exit status should be believed
# -ignore_write_errors, # retry on broken pipes
# pipe - deliver mail to shell commands
# This is used implicitly when smail encounters addresses which begin with
# a vertical bar character, such as "|/usr/lib/news/recnews talk.bizarre".
# The vertical bar is removed from the address before being given to the
# transport.
#pipe: driver = pipe, # pipe message to another program
# return_path, local, from, unix_from_hack;
#
# cmd = "/bin/sh -c $user", # send address to the Bourne Shell
# parent_env, # environment info from parent addr
# pipe_as_user, # use user-id associated with address
# umask = 0022, # umask for child process
# -log_output, # do not log stdout/stderr
# ignore_status, # exit status may be bogus, ignore it
# ignore_write_errors, # ignore broken pipes
# file - deliver mail to files
# This is used implicitly when smail encounters addresses which begin with
# a slash or squiggle character, such as "/usr/info/list_messages" or
# perhaps "~/Mail/inbox".
#file: driver = appendfile,
# return_path, local, from, unix_from_hack;
#
# file = $user, # file is taken from address
# append_as_user, # use user-id associated with address
# expand_user, # expand ~ and $ within address
# check_path,
# suffix = "\n",
# mode = 0644
# uux - deliver to the rmail program on a remote UUCP site
#
# As many as five recipient addresses will be delivered to the remote
# host in one UUCP transaction.
uux: driver = pipe,
-uucp,
inet,
# uucp, # use UUCP-style addressing forms
from, # supply a From_ envelope line
max_addrs = 5, # at most 5 addresses per invocation
max_chars = 200; # at most 200 chars of addresses
# the -r flag prevents immediate delivery, parentheses around the
# $user variable prevent special interpretation by uux.
cmd = "/usr/bin/uux - -r -g$grade $host!rmail $((${strip:user})$)",
# cmd="/usr/bin/uux - $host!rmail $(($user)$)",
ignore_write_errors, # ignore broken pipes
umask = 0022,
# pipe_as_sender,
# uux_one_addr - deliver mail over UUCP to a remote host that can take
# one address at a time.
# This is often necessary when delivering to a site running an unmodified
# version of 4.1BSD.
uux_one_addr:
driver = pipe,
uucp, # use UUCP-style addressing forms
from; # supply a From_ envelope line
# the -r flag prevents immediate delivery
cmd = "/usr/bin/uux - -r -g$grade $host!rmail (${strip:user})",
umask = 0022,
pipe_as_sender
queueonly:
driver = pipe; # send the message to a pipe
cmd = "/usr/lib/sendmail -Q -f $sender -bm $user",
# use getmail for local delivery
user=root, # execute getmail as "root"
group=mail, # execute getmail as "mail"
parent_env, # environment info from parent addr
-pipe_as_user, # use user-id associated with address
umask = 0007, # umask for child process
# to deliver the message. The smtp transport is included only if BSD
# networking exists.
# The uucp attribute can be specified for transfers within the UUCP
# zone. The inet attribute must be specified for transfers within the
# Internet.
# NOTE: This is hardly optimal, a backend should exist which can handle
# multiple messages per connection.
# ALSO: It may be necessary to restrict max_addrs to 100, as this is the
# lower limit SMTP requires an implementation to handle for one
# message.
smtp: driver=tcpsmtp,
inet, # if UUCP_ZONE is not defined
# uucp, # if UUCP_ZONE is defined
-max_addrs, -max_chars; # no limit on number of addresses
short_timeout=5m, # timeout for short operations
long_timeout=2h, # timeout for longer SMTP operations
service=smtp, # connect to this service port
# For internet use: uncomment the below 4 lines
use_bind, # resolve MX and multiple A records
defnames, # use standard domain searching
defer_no_connect, # try again if the nameserver is down
local_mx_okay, # fail an MX to the local host
ifmail:
from,received,max_addrs=5,max_chars=200,
driver=pipe;
pipe_as_sender,
cmd="/usr/local/bin/ifmail -x9 -r$host $((${strip:user})$)"
You should include an ifmail chapter only if you use ifmail for FIDO mails. Apart from that, you shouldn't need to edit anything in this file which defines transport agents (like uux, smtp ...) you can use as parameters in other config. files.
Note I commented out some parts, like "pipes" or "file", to enhance security.
It contains map and table files :
First, map file
#N foo.bar foo2.bar2
#S AT 486/RedHat Linux 1.2.13
#O organization
#C contact
#E administration (email)
#T phone
#P address
#R
#U hosts connected via uucp
#W created/edited by
#
hname polux
hname linux.eu.org
hname = polux
hname = polux.linux.eu.org
Once again, edit this file to match you situation (I'm fed by polux.linux.eu.org).
Now table file
* uux
You can define different transports to different path, for exemple "smtp" for the machines in your local network, "uux" (i.e. uucp) for the rest of the world or vice-versa (I'm using uucp for any outgoing mail, therefore I use "*" !).
The previous files are the one I currently use for my site, you shouldn't encounter any problem using them as samples/basis for your own files.
The following files are provided only as good exemples to configure smail a different way.
#ident "@(#) transports,v 1.2 1990/10/24 05:20:46 tron Exp"
# See smail(5) for a complete description of the contents of this file.
# local - deliver mail to local users
#
# Tell smail to append directly to user mailbox files in the /usr/mail
# directory.
local: driver = appendfile, # append message to a file
return_path, # include a Return-Path: field
local, # use local forms for delivery
from, # supply a From_ envelope line
unix_from_hack; # insert > before From in body
file = /usr/mail/${lc:user}, # use this location for System V
group = mail, # group to own file for System V
mode = 0660, # under System V, group mail can access
suffix = "\n", # append an extra newline
append_as_user,
# pipe - deliver mail to shell commands
#
# This is used implicitly when smail encounters addresses which begin with
# a vertical bar character, such as "|/usr/lib/news/recnews talk.bizarre".
# The vertical bar is removed from the address before being given to the
# transport.
pipe: driver = pipe, # pipe message to another program
return_path, local, from, unix_from_hack;
cmd = "/bin/sh -c $user", # send address to the Bourne Shell
parent_env, # environment info from parent addr
pipe_as_user, # use user-id associated with address
umask = 0022, # umask for child process
-log_output, # do not log stdout/stderr
ignore_status, # exit status may be bogus, ignore it
ignore_write_errors, # ignore broken pipes
# file - deliver mail to files
#
# This is used implicitly when smail encounters addresses which begin with a
# slash or squiggle character, such as "/usr/info/list_messages" or perhaps
# "~/Mail/inbox".
file: driver = appendfile,
return_path, local, from, unix_from_hack;
file = $user, # file is taken from address
append_as_user, # use user-id associated with address
expand_user, # expand ~ and $ within address
suffix = "\n",
mode = 0644
# uux - deliver to the rmail program on a remote UUCP site
#
# As many as five recipient addresses will be delivered to the remote host in
# one UUCP transaction.
uux: driver = pipe,
uucp, # use UUCP-style addressing forms
from, # supply a From_ envelope line
max_addrs = 5, # at most 5 addresses per invocation
max_chars = 200; # at most 200 chars of addresses
# the -r flag prevents immediate delivery, parentheses around the
# $user variable prevent special interpretation by uux.
cmd = "/usr/bin/uux - -r -g$grade $host!rmail $((${strip:user})$)",
umask = 0022,
pipe_as_sender
# uux_one_addr - deliver mail over UUCP to a remote host that can take one
# address at a time.
#
# This is often necessary when delivering to a site running an unmodified
# version of 4.1BSD.
uux_one_addr:
driver = pipe,
uucp, # use UUCP-style addressing forms
from; # supply a From_ envelope line
# the -r flag prevents immediate delivery
cmd = "/usr/bin/uux - -r -g$grade $host!rmail (${strip:user})",
umask = 0022, pipe_as_sender
# demand - deliver to a remote rmail program, polling on demand
demand: driver = pipe,
uucp, from, max_addrs = 5, max_chars = 200;
# with no -r flag, try to contact remote site immediately
cmd = "/usr/bin/uux - -g$grade $host!rmail $(($user)$)",
umask = 0022, pipe_as_sender
# uusmtp - deliver to the rsmtp program on a remote UUCP site
#
# Deliver using a simple Batched SMTP protocol to the remote machine.
# This allows much more arbitrary addresses to be used. It also
# removes the limit on recipient addresses per invocation of uux.
uusmtp: driver = pipe,
bsmtp, # send batched SMTP commands
-max_addrs, # there is no limit on the number or
-max_chars; # total size of recipient addresses.
# supply -r to prevent immedate delivery, the recipient addresses
# are stored in the data sent to the standard input of rsmtp.
cmd = "/usr/bin/uux - -r -g$grade $host!rsmtp",
umask = 0022, pipe_as_sender
# demand_uusmtp - deliver to a remote rsmtp program, polling on demand
demand_uusmtp:
driver = pipe,
bsmtp, -max_addrs, -max_chars;
# with no -r flag, try to contact remote site immediately
cmd = "/usr/bin/uux - -g$grade $host!rsmtp",
umask = 0022, pipe_as_sender
# smtp - deliver using SMTP over TCP/IP
#
# Connect to a remote host using TCP/IP and initiate an SMTP conversation to
# deliver the message. The smtp transport is included only if BSD networking
# exists.
# NOTE: It may be necessary to restrict max_addrs to 100, as this is the
# lower limit SMTP requires an implementation to handle for one
# message.
smtp: driver = smtp,
-max_addrs,
-max_chars
#ident "@(#) table,v 1.2 1990/10/24 05:20:31 tron Exp"
# This file names the transports that are to be used in delivering
# to specific hosts from bargw.
#host transport
#-------- ---------
curdsgw demand_uusmtp # deliver using batched SMTP
oldbsd uux_one_addr # 4.1BSD sites cannot take more than one addr
sun demand # call sun when their is mail to send
* uux # for all others, poll at intervals
To run smail as a smtp daemon, add one of the following to /etc/inetd.conf:
smtp stream tcp nowait root /usr/bin/smtpd smtpd
or:
smtp stream tcp nowait root /usr/sbin/tcpd /usr/sbin/in.smtpd
Outgoing mail gets sent automatically, when using elm.
Generally, ISPs use smtp, therefore you shouldn't have any problems
sending your mail. If your internet link is down when you send mail,
then the mail sits in "/var/spool/smail/input". When the link
next comes up, "runq" is run which causes the mail to be
sent. However, receiving mail is the problem since your
provider has many clients to look after, not only you !
Usually, you can retreive your mail via the POP protocol, see POP section below.