diff options
Diffstat (limited to 'debian/sendmailconfig')
| -rw-r--r-- | debian/sendmailconfig | 566 |
1 files changed, 566 insertions, 0 deletions
diff --git a/debian/sendmailconfig b/debian/sendmailconfig new file mode 100644 index 0000000..3d44a9e --- /dev/null +++ b/debian/sendmailconfig @@ -0,0 +1,566 @@ +#!/bin/sh -e +# +# Interactively configure Sendmail for Debian +# +# Robert Leslie <rob@mars.org> + +PATH="/usr/sbin:/usr/bin:/sbin:/bin" + +reload="yes" +umask 022 + +############################################################################### + +while [ $# -gt 0 ] +do + case "$1" in + --no-reload) + reload="" + shift + ;; + + *) + echo "Usage: $0 [--no-reload]" >&2 + exit 1 + ;; + esac +done + +############################################################################### + +descrip() { + echo "" + echo "$1" + echo "$1" | sed -e 's/./-/g' + cat - + echo "" +} + +yesno() { + local N="N" Y="Y" + local q="$1" def=$(eval "echo -n \$$2") + + while : + do + echo -n "$q? [$def] " + read REPLY + REPLY=$(echo -n "$REPLY" | sed -e "s/^\ *//" -e "s/^\t*//") + test -n "$REPLY" || REPLY="$def" + + case "$REPLY" in + [Yy]*) + echo yes > /dev/null + eval "$2=\"Y\"" + return 0 + ;; + + [Nn]*) + echo no > /dev/null + eval "$2=\"N\"" + return 1 + ;; + esac + done +} + +input() { + local q="$1" def=$(eval "echo -n \$$2") + + echo -n "$q? [$def] " + read REPLY + REPLY=$(echo "$REPLY" | sed -e 's/^[ ]*//' -e 's/[ ]*$//' | cat) + test -n "$REPLY" || REPLY="$def" + + if [ NONE = "$3" ] + then + test NONE != "$REPLY" || REPLY="" + fi + + eval "$2=\"$REPLY\"" +} + +testconfig() { + CONFIG=$(grep "$1" /etc/mail/sendmail.mc 2>/dev/null) +} + +makecf() { + echo "Generating /etc/mail/sendmail.cf from /etc/mail/sendmail.mc ..." + m4 /usr/lib/sendmail.cf/m4/cf.m4 /etc/mail/sendmail.mc \ + >/etc/mail/sendmail.cf.new + mv -f /etc/mail/sendmail.cf.new /etc/mail/sendmail.cf + + echo "Updating alias database ..." + newaliases + + if [ "$reload" ] && \ + yesno "Reload the running sendmail now with the new configuration" Y + then + echo "Reloading sendmail ..." + /etc/init.d/sendmail reload >/dev/null + fi +} + +############################################################################### + +if [ -f /etc/mail/sendmail.mc ] +then + if yesno "Configure sendmail with the existing /etc/mail/sendmail.mc" Y + then + makecf + exit 0 + fi +fi + +############################################################################### + +exec 3>/etc/mail/sendmail.mc.new +trap "rm -f /etc/mail/sendmail.mc.new" 0 + +############################################################################### + +descrip "Sendmail Configuration" <<EOT +By answering the following questions, you can configure sendmail for your +system. Default values are determined either by your existing configuration +or from common usage. +EOT + +echo -n "Press [ENTER] " +read REPLY + +cat /usr/lib/sendmail.cf/cf/debproto.mc >&3 + +############################################################################### + +descrip "Mail Name" <<EOT +Your \`mail name' is the hostname portion of the address to be shown on +outgoing news and mail messages (following the username and @ sign). This +name will be used by other programs besides sendmail; it should be the single, +full domain name (FQDN) from which mail will appear to originate. +EOT + +mailname=$(cat /etc/mailname 2>/dev/null || hostname --fqdn) +input "Mail name" mailname + +echo "$mailname" >/etc/mailname + +############################################################################### + +descrip "Null Client" <<EOT +A special configuration known as the "null client" can be created for this +host if all mail should be forwarded to a central hub via a local SMTP-based +network. This may be a suitable configuration if you want to forward all of +your mail to your local Internet service provider (ISP) for delivery. + +To enable this option, give the name of the host to which all mail should be +forwarded. Otherwise leave the option empty or answer \`NONE' to disable it. +EOT + +nullclient="" +! testconfig "FEATURE(nullclient" || + nullclient=$(echo -n "$CONFIG" | sed -e 's/[^,]*, *\([^)]*\).*/\1/') + +input "Null client forward host" nullclient NONE + +test -z "$nullclient" || echo "FEATURE(nullclient, $nullclient)dnl" >&3 + +############################################################################### + +descrip "Address Canonification" <<EOT +Usually sendmail will canonify all addresses by consulting a name server and +resolving hosts to their fully qualified domain name (FQDN). Under special +circumstances you may want to disable this feature, for example if this +machine acts only as a mail gateway. +EOT + +test -z "$nullclient" || cat <<EOT +Since this host will be configured as a null client, this option controls +whether addresses will be qualified with \`$mailname' when +sent to the central hub via SMTP. Disabling this feature may cause mail to +appear to come from (and be qualified by the domain for) the hub machine +rather than this host. + +EOT + +nocanonify="N" +! testconfig "FEATURE(nocanonify)" || nocanonify="Y" + +! yesno "Disable address canonification" nocanonify || + echo "FEATURE(nocanonify)dnl" >&3 + +############################################################################### + +if [ -z "$nullclient" ] +then + +############################################################################### + +descrip "SMTP Mailer" <<EOT +If you plan to exchange mail with other computers, you should enable the +SMTP mailer. Even if you don't plan to exchange mail with other computers, +it is still a good idea to enable this so local programs can use it. +EOT + +smtp="Y" +if [ -f /etc/mail/sendmail.mc ] +then + testconfig "MAILER(smtp)" || smtp="N" +fi + +yesno "Enable the SMTP mailer" smtp || true + +############################################################################### + +descrip "Masquerade Envelope" <<EOT +If you want mail envelopes (as well as mail headers) to appear to come from +\`$mailname', you can enable this option. +EOT + +masqenvelope="Y" +if [ -f /etc/mail/sendmail.mc ] +then + testconfig "FEATURE(masquerade_envelope)" || masqenvelope="N" +fi + +! yesno "Masquerade envelopes" masqenvelope || + echo "FEATURE(masquerade_envelope)dnl" >&3 + +############################################################################### + +descrip "All Masquerade" <<EOT +If enabled, this feature will cause recipient addresses to also appear to come +from \`$mailname'. Normally they get the local hostname. +Although this may be right for ordinary users, it can break local aliases. For +example, if you send to "localalias", the originating sendmail will find that +alias and send to all members, but send the message with +"To: localalias@$mailname". Since that alias likely does +not exist, replies will fail. Use this feature ONLY if you can guarantee that +the ENTIRE namespace of \`$mailname' supersets all the +local entries. If in doubt, it is safe to leave this option disabled. +EOT + +allmasquerade="N" +! testconfig "FEATURE(allmasquerade)" || allmasquerade="Y" + +! yesno "All masquerade" allmasquerade || + echo "FEATURE(allmasquerade)dnl" >&3 + +############################################################################### + +descrip "Always Add Domain" <<EOT +If enabled, the local host domain is included even on locally delivered mail. +Normally it is not added unless it is already present. +EOT + +alwaysdomain="N" +! testconfig "FEATURE(always_add_domain)" || alwaysdomain="Y" + +! yesno "Always add domain" alwaysdomain || + echo "FEATURE(always_add_domain)dnl" >&3 + +############################################################################### + +descrip "Mail Acceptance" <<EOT +Sendmail is usually configured to accept mail for your mail name +($mailname). However, under special circumstances you +may not wish sendmail to do this, particularly if (and disabling this option +generally requires that) mail for \`$mailname' is MXed +to another host. If in doubt, it is safe to leave this option enabled. +EOT + +acceptmailname="Y" +if [ -f /etc/mail/sendmail.mc ] +then + testconfig "^Cw.*$mailname" || acceptmailname="N" +fi + +yesno "Accept mail for \`$mailname'" acceptmailname || true + +############################################################################### + +descrip "Alternate Names" <<EOT +In addition to the canonical mail name \`$mailname', you can +add any number of additional alternate names to recognize for receiving mail. +If other hosts are MXed to you for local mail, this is where you should list +them. This list is saved into the file /etc/mail/sendmail.cw so it can be +changed later as needed. + +To answer this question, separate each alternate name with a space, or answer +\`NONE' to eliminate all alternate names. +EOT + +altnames=$(cat /etc/mail/sendmail.cw 2>/dev/null | tr -s '\n \t' ' ' | + sed -e 's/^ *//' -e 's/ *$//') +input "Alternate names" altnames NONE + +if [ -n "$altnames" ] +then + echo "$altnames" | tr -s ' \t' '\n' >/etc/mail/sendmail.cw +else + cat /dev/null >/etc/mail/sendmail.cw +fi + +echo "FEATURE(use_cw_file)dnl" >&3 + +############################################################################### + +descrip "Trusted Users" <<EOT +Sendmail allows a special group of users to set their envelope "From" address +using the -f option without generating a warning message. If you have +software such as Majordomo installed, you will want to include the usernames +from such software here. Note that "root", "daemon", and "uucp" are included +automatically and do not need to be specified. This list is saved into the +file /etc/mail/sendmail.ct so it can be changed later as needed. + +To answer this question, separate each username with a space, or answer +\`NONE' to eliminate all usernames. +EOT + +trusted=$(cat /etc/mail/sendmail.ct 2>/dev/null | tr -s '\n \t' ' ' | + sed -e 's/^ *//' -e 's/ *$//') +input "Trusted users" trusted NONE + +if [ -n "$trusted" ] +then + echo "$trusted" | tr -s ' \t' '\n' >/etc/mail/sendmail.ct +else + cat /dev/null >/etc/mail/sendmail.ct +fi + +echo "FEATURE(use_ct_file)dnl" >&3 + +############################################################################### + +descrip "Redirect Feature" <<EOT +If enabled, this feature will allow you to alias old names to +<new-address>.REDIRECT, causing sendmail to return mail to the sender with +an error but indicating the recipient's new address. +EOT + +redirect="N" +! testconfig "FEATURE(redirect)" || redirect="Y" + +! yesno "Enable redirect option" redirect || echo "FEATURE(redirect)dnl" >&3 + +############################################################################### + +descrip "UUCP Addresses" <<EOT +Sendmail can be configured to be smart about UUCP addresses, or it can do +nothing special with UUCP addresses at all. If you care about UUCP, you will +need to do some additional configuration, perhaps outside of this script. +EOT + +uucp="N" +if [ -f /etc/mail/sendmail.mc ] +then + testconfig "FEATURE(nouucp)" || uucp="Y" +fi + +yesno "Enable UUCP addressing" uucp || echo "FEATURE(nouucp)dnl" >&3 + +############################################################################### + +descrip "Sticky Host" <<EOT +If enabled, mail sent to \`user@$mailname' is marked as +"sticky" -- that is, the local addresses aren't matched against UDB and don't +go through ruleset 5. This is used if you want a setup where \`user' is not +necessarily the same as \`user@$mailname', e.g., to make +a distinct domain-wide namespace. If in doubt, it is safe to leave this +option disabled. +EOT + +sticky="N" +! testconfig "FEATURE(stickyhost)" || sticky="Y" + +! yesno "Enable sticky host option" sticky || echo "FEATURE(stickyhost)dnl" >&3 + +############################################################################### + +descrip "DNS" <<EOT +If you are directly connected to the Internet and have access to a domain +name server, you should enable this option. +EOT + +dns="Y" +! testconfig "FEATURE(nodns)" || dns="N" + +yesno "Enable DNS" dns || echo "FEATURE(nodns)dnl" >&3 + +############################################################################### + +if [ Y = "$dns" ] +then + +############################################################################### + +descrip "Best MX is Local" <<EOT +If enabled, this option will cause sendmail to accept mail as though locally +addressed for any host that lists this machine as the best possible MX record. +This generates additional DNS traffic, but should be OK for low-to-medium +traffic hosts. N.B.: This feature is fundamentally incompatible with wildcard +MX records. If you have a wildcard MX record that matches your domain, you +cannot use this feature. +EOT + +bestmxlocal="N" +! testconfig "FEATURE(bestmx_is_local)" || bestmxlocal="Y" + +! yesno "Assume best MX is local" bestmxlocal || + echo "FEATURE(bestmx_is_local)dnl" >&3 + +############################################################################### + +fi # finished DNS configuration + +############################################################################### + +descrip "Mailertable" <<EOT +If enabled, this option causes sendmail to read mail routing rules from +the text file /etc/mail/mailertable. This is needed for unusual mailers like +ifmail and fax programs. More information is in /usr/doc/sendmail/op.txt.gz. +EOT + +mailertable="N" +! testconfig "FEATURE(mailertable" || mailertable="Y" + +! yesno "Enable the mailertable feature" mailertable || + echo "FEATURE(mailertable, \`text /etc/mail/mailertable')dnl" >&3 + +############################################################################### + +descrip "Sendmail Restricted Shell" <<EOT +If enabled, this option causes sendmail to use the sendmail restricted shell +program (smrsh) instead of /bin/sh for mailing to programs. This improves your +ability to control what gets run via email; only those programs which appear +in a special directory can be run. If you enable this option, please carefully +read the smrsh(8) man page for further information. +EOT + +smrsh="N" +! testconfig "FEATURE(smrsh" || smrsh="Y" + +! yesno "Use the Sendmail Restricted Shell (smrsh)" smrsh || + echo "FEATURE(smrsh, \`/usr/sbin/smrsh')dnl" >&3 + +############################################################################### + +descrip "Mailer Name" <<EOT +You can change the name used for internally generated outgoing messages. +Usually this is \`MAILER-DAEMON' but it would not be unreasonable to change +it to something such as \`postmaster'. +EOT + +daemon="MAILER-DAEMON" +! testconfig "confMAILER_NAME" || + daemon=$(echo -n "$CONFIG" | sed -e 's/[^,]*, *`\([^'"'"']*\).*/\1/') + +input "Mailer name" daemon + +test "MAILER-DAEMON" = "$daemon" || + echo "define(\`confMAILER_NAME', \`$daemon')dnl" >&3 + +############################################################################### + +descrip "Me Too" <<EOT +Sendmail normally excludes the sender address from group expansion. Enabling +this option will cause the sender to be included. +EOT + +metoo="N" +! testconfig "confME_TOO.*True" || metoo="Y" + +! yesno "Enable me too option" metoo || + echo "define(\`confME_TOO', True)dnl" >&3 + +############################################################################### + +descrip "Message Timeouts" <<EOT +Sendmail will issue a warning message to the sender if it can't deliver a +message within a reasonable amount of time. It will also send a failure +notification and give up trying to deliver the message if it can't deliver it +after an unreasonable amount of time. + +You can configure the message timeouts after which warning and failure +notifications are sent. Sendmail's defaults are 4 hours and 5 days (4h/5d), +respectively, but many people feel warnings after only 4 hours are premature. +EOT + +qw="4h" +! testconfig "confTO_QUEUEWARN" || + qw=$(echo -n "$CONFIG" | sed -e 's/[^,]*, *`\([^'"'"']*\).*/\1/') + +qr="5d" +! testconfig "confTO_QUEUERETURN" || + qr=$(echo -n "$CONFIG" | sed -e 's/[^,]*, *`\([^'"'"']*\).*/\1/') + +timeouts="$qw/$qr" + +input "Message timeouts" timeouts + +qw=$(expr "$timeouts" : '\([^/]*\)/') +qr=$(expr "$timeouts" : '[^/]*/\(.*\)') + +test "4h" = "$qw" || echo "define(\`confTO_QUEUEWARN', \`$qw')dnl" >&3 +test "5d" = "$qr" || echo "define(\`confTO_QUEUERETURN', \`$qr')dnl" >&3 + +############################################################################### + +echo "MAILER(local)dnl" >&3 + +test "N" = "$smtp" || echo "MAILER(smtp)dnl" >&3 +test "N" = "$acceptmailname" || echo "Cw$mailname" >&3 + +############################################################################### + +if [ -e /etc/ifmail/config ] && [ -e /usr/lib/sendmail.cf/mailer/ifmail.m4 ]; +then + echo "MAILER(ifmail)dnl" >&3 +fi + +############################################################################### + +fi # finished non-"null client" configuration + +echo "MASQUERADE_AS($mailname)dnl" >&3 + +############################################################################### + +echo "" >&3 + +if [ -f /etc/mail/sendmail.mc ] +then + sed -n -e '/^## Custom/,$p' /etc/mail/sendmail.mc >&3 +else + echo "## Custom configurations below (will be preserved)" >&3 +fi + +descrip "Configuration Complete" <<EOT +Advanced configuration, such as alternate mailers, the use of mailertables, +Bitnet domains, and UUCP domains can be accomplished by manually editing the +/etc/mail/sendmail.mc configuration file and rerunning +\`$0' to generate the appropriate /etc/mail/sendmail.cf +file. (Local changes made at the end of /etc/mail/sendmail.mc will be +preserved by \`$0'.) + +The m4 library files for sendmail configuration are kept in the +/usr/lib/sendmail.cf directory. You may wish to review the documentation in +/usr/doc/sendmail to assist in further customization. + +You may wish to customize your alias database; see the aliases(5) man page +for information on the format and use of the /etc/aliases file. +EOT + +############################################################################### + +exec 3>&- + +if [ -f /etc/mail/sendmail.mc ] +then + echo "Saving old /etc/mail/sendmail.mc as /etc/mail/sendmail.mc.old ..." + mv -f /etc/mail/sendmail.mc /etc/mail/sendmail.mc.old +fi + +mv -f /etc/mail/sendmail.mc.new /etc/mail/sendmail.mc +trap 0 + +makecf +exit 0 |