#!/bin/bash
# * intro
-# Copyright (C) 2019 Ian Kelling
-# SPDX-License-Identifier: AGPL-3.0-or-later
+
+# Program to install and configure Ian's email related programs
+# Copyright (C) 2024 Ian Kelling
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+# SPDX-License-Identifier: GPL-3.0-or-later
# todo:
# on bk (and fsf servers that run multiple exim4 daemons, eg eximfsf2 and eximfsf3),
# todo: run mailping test after running, or otherwise
# clear out terminal alert
-# todo: disable postgrey
+# todo: disable postgrey. (why did we have it?)
# todo: in testforward-check, we should also look
shopt -s nullglob
-if [[ -s /usr/local/lib/err ]]; then
- source /usr/local/lib/err
-elif [[ -s /a/bin/errhandle/err ]]; then
- source /a/bin/errhandle/err
+if [[ -s /usr/local/lib/bash-bear ]]; then
+ source /usr/local/lib/bash-bear
+elif [[ -s /a/bin/bash-bear-trap/bash-bear ]]; then
+ source /a/bin/bash-bear-trap/bash-bear
else
echo "no err tracing script found"
exit 1
mailhost() {
[[ $HOSTNAME == "$MAIL_HOST" ]]
}
-e() { printf "%s\n" "$*"; }
reifactive() {
for service; do
if systemctl is-active $service >/dev/null; then
bhost_t=false
case $HOSTNAME in
$MAIL_HOST) : ;;
- kd|frodo|x2|x3|kw|sy|bo)
+ kd|x2|x3|kw|sy|bo|so)
bhost_t=true
;;
esac
EOF
fi
+# name change in t12, and now timer instead of cron option in /etc/default
+first_spamd_run=false
+if ! systemctl cat spamassassin-maintenance.timer &>/dev/null; then
+ first_spamd_run=true
+fi
+
+
# light version of exim does not have sasl auth support.
# note: for bitfolk hosts, unbound has important config with conflink.
pi-nostart exim4 exim4-daemon-heavy spamassassin unbound clamav-daemon wireguard
+spamd_ser=spamd
+if systemctl cat spamassassin &>/dev/null; then
+ spamd_ser=spamassassin
+elif $first_spamd_run; then
+ systemctl start spamassassin-maintenance
+fi
+
+systemctl enable --now spamassassin-maintenance.timer
+
# note: pyzor debian readme says you need to run some initialization command
# but its outdated.
-pi spf-tools-perl p0f postgrey pyzor razor jq moreutils certbot fail2ban
+pi spf-tools-perl p0f pyzor razor jq moreutils certbot fail2ban
+pu postgrey
case $HOSTNAME in
je) : ;;
# not included due to using wireguard: openvpn
# our nostart pi fails to avoid enabling
+
+# * initial dns config & daemon setup
+#
+# use systemd-resolved for glibc resolutions, setup symlinks
+
+pi libnss-resolve
+
+# if this link gets replaced with a normal file we will get exim log
+# errors on MAIL_HOST like so:
+#
+# R=fsfsmarthost defer (-36) DT=0s: host lookup for mail.fsf.org did not complete (DNS timeout?)
+
+if [[ ! -L /etc/nsswitch.conf ]]; then
+ sudo mkdir -p /etc/resolved-nsswitch
+ sudo mv /etc/nsswitch.conf /etc/resolved-nsswitch
+ sudo ln -sf /etc/resolved-nsswitch/nsswitch.conf /etc
+fi
+
+f=/etc/basic-nsswitch/nsswitch.conf
+if [[ ! -e $f ]]; then
+ sudo mkdir -p ${f%/*}
+ sudo cp /etc/nsswitch.conf $f
+ sudo sed -i --follow-symlinks 's/^ *hosts:.*/hosts: files dns myhostname/' $f
+fi
+case $HOSTNAME in
+ bk|je)
+ # je should be able to get along systemd-resolved, but ive had some odd
+ # very intermittent dns failures with spamassassin, it seems it might only
+ # be happening with systemd-resolved, so just use unbound
+ # to make it consistent with the other hosts.
+ sudo sed -i --follow-symlinks 's/^ *hosts:.*/hosts: files dns myhostname/' /etc/nsswitch.conf
+ soff systemd-resolved
+ sudo ln -sf 127.0.0.1-resolv/stub-resolv.conf /etc/resolv.conf
+ sgo unbound
+ # cautious measure to make sure resolution is working
+ sleep 1
+ ;;
+ *)
+ # default is
+ # files mdns4_minimal [NOTFOUND=return] dns myhostname
+ # mdns4 is needed for my printer and for bbb webrtc, not sure exactly why.
+ # https://www.freedesktop.org/software/systemd/man/nss-resolve.html#
+ # seems more important than some potential use case.
+ # Interestingly, t9/t10 man page says use files before resolve, debian 10 says the opposite.
+ # removing files makes hostname -f not actually give the fully qualified domain name.
+ sudo sed -i --follow-symlinks 's/^ *hosts:.*/hosts: files resolve [!UNAVAIL=return] mdns4_minimal [NOTFOUND=return] myhostname/' /etc/resolved-nsswitch/nsswitch.conf
+ ;;
+esac
+
+case $HOSTNAME in
+ bk)
+ sgo named
+ ;;
+esac
+
+
+lines=(
+ "/etc/resolved-nsswitch/nsswitch.conf r,"
+ "/etc/basic-nsswitch/nsswitch.conf r,"
+ # Aug 06 23:09:11 kd audit[3995]: AVC apparmor="DENIED" operation="connect" profile="/usr/bin/freshclam" name="/run/systemd/resolve/io.systemd.Resolve" pid=3995 comm="freshclam" requested_mask="wr" denied_mask="wr" fsuid=109 ouid=101
+ # I dont know if this is quite the right fix, but I saw other sockets
+ # in the nameservice files that were rw, so figured it was ok to add this and it worked.
+ "/run/systemd/resolve/io.systemd.Resolve rw,"
+)
+f=/etc/apparmor.d/abstractions/nameservice
+apparmor_reload=false
+if [[ -e $f ]]; then
+ for l in "${lines[@]}"; do
+ if ! grep -qF "$l" $f; then
+ sudo sed -i "/\/nsswitch.conf/a $l" $f
+ apparmor_reload=true
+ if ! grep -qF "$l" $f; then
+ echo "$0: failed editing $f. investigate"
+ exit 1
+ fi
+ fi
+ done
+ if $apparmor_reload && systemctl is-active apparmor; then
+ m ser reload apparmor
+ fi
+fi
+
+
+
# * Mail clean cronjob
u /etc/systemd/system/mailclean.timer <<'EOF'
# this is just a bug fix for trisquel.
f=/etc/apparmor.d/usr.sbin.unbound
-line="/usr/sbin/unbound flags=(attach_disconnected) {"
-if ! grep -qFx "$line" $f; then
- badline="/usr/sbin/unbound {"
- if ! grep -qFx "$badline" $f; then
+good_string="/usr/sbin/unbound flags=(attach_disconnected) {"
+if ! grep -qF "$good_string" $f; then
+ bad_string="/usr/sbin/unbound {"
+ if ! grep -qF "$bad_string" $f; then
err expected line in $f not found
fi
- sed -i "s,^$badline$,$line," $f
+ sed -i "s,$bad_string$,$good_string," $f
if systemctl is-active apparmor &>/dev/null; then
m systemctl reload apparmor
fi
fi
+
# note: anything added to nn_progs needs corresponding rm
# down below in the host switch
nn_progs=(exim4)
if mailhost; then
# Note dovecots lmtp doesnt need to be in the same nn to accept delivery.
# Its in the nn so remote clients can connect to it.
- nn_progs+=(spamassassin dovecot)
+ nn_progs+=($spamd_ser dovecot)
fi
case $HOSTNAME in
done
;;
*)
- for unit in exim4 spamassassin dovecot unbound; do
+ for unit in exim4 $spamd_ser dovecot unbound; do
f=/etc/systemd/system/$unit.service.d/nn.conf
if [[ -s $f ]]; then
rm -fv $f
# 2020-10-19 remove old file. remove this when all hosts updated
rm -fv /etc/systemd/system/spamddnsfix.{timer,service}
-u /etc/default/spamassassin <<'EOF'
+u /etc/default/$spamd_ser <<'EOF'
# defaults plus debugging flags for an issue im having
OPTIONS="--create-prefs --max-children 5 --helper-home-dir"
-PIDFILE="/var/run/spamd.pid"
+PIDFILE="/run/spamd.pid"
# my additions
NICE="--nicelevel 15"
+# not used in t12+, that uses
+# /usr/lib/systemd/system/spamassassin-maintenance.timer
CRON=1
EOF
ignoreip = 209.51.188.13 2001:470:142::13 209.51.188.92 2001:470:142:3::10 72.14.176.105 2600:3c00:e000:280::2 10.173.8.1
EOF
if $ur; then
+ # Ensure the log file monitored by fail2ban exists, or else fail2ban can't start.
+ if [[ ! -e /var/log/exim4/mainlog ]]; then
+ install -m 640 -o Debian-exim -g adm /dev/null /var/log/exim4/mainlog
+ fi
m systemctl restart fail2ban
fi
# plus debug does not help.
# sudo -u radicale radicale -D
- # created password file with:
- # htpasswd -c /p/c/machine_specific/li/filesystem/etc/caldav-htpasswd
+ # created radicale password file with:
+ # htpasswd -c /p/c/machine_specific/li/filesystem/etc/caldav-htpasswd ian
# chmod 640 /p/c/machine_specific/li/filesystem/etc/caldav-htpasswd
# # setup chgrp www-data in ./conflink
ssl = required
# this is the same as the certbot list, i check changes in /a/bin/ds/filesystem/usr/local/bin/check-lets-encrypt-ssl-settings
ssl_cipher_list = ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384
-ssl_protocols = TLSv1.2
+ssl_min_protocol = TLSv1.2
ssl_prefer_server_ciphers = no
protocol lmtp {
# default is just $mail_plugins
mail_plugins = $mail_plugins sieve
}
+
+# /etc/dovecot/conf.d/10-master.conf says the default is 256M.
+# but I started getting oom errors in the syslog
+# Mar 27 15:10:04 sy dovecot[330088]: lmtp(iank)<3839880><gO/BDwtvBGaIlzoA7AdaJQ>: Fatal: master: service(lmtp): child 3839880 returned error 83 (Out of memory (service lmtp { vsz_limit=256 MB }, you may need to increase it) - set CORE_OUTOFMEM=1 environment to get core dump)
+# exim would just queue mail until it eventually succeeded.
+# Deciding what to increase it to, I found this
+# https://dovecot.org/list/dovecot/2011-December/080056.html
+# which suggests 3x the largest dovecot.index.cache file
+# and then I found that
+# md/l/testignore/dovecot.index.cache is 429M, my largest cache file,
+# but that folder only has 2k messages.
+# next biggest is md/l/qemu-devel/dovecot.index.cache 236M
+# which lead to me a search https://doc.dovecot.org/admin_manual/known_issues/large_cache/
+# which suggests 1.5x the maximum cache file size 1G, and
+# that I can safely rm the index.
+default_vsz_limit = 1500M
+
EOF
if dpkg --compare-versions "$(dpkg-query -f='${Version}\n' --show dovecot-core)" ge 1:2.3; then
cat <<EOF
fi
rm -fv /etc/dovecot/conf.d/20-lmtp.conf # file from prev version
+
+ # Having backups of indexes is a waste of space. This also means we
+ # don't send them around with btrbk, I think it is probably
+ # preferable use a bit more cpu to recalculate indexes.
+ install -d -m 700 -o iank -g iank /var/dovecot-indexes
cat >>/etc/dovecot/local.conf <<EOF
+
+
+# This will decrease memory use, and seems likely to decrease cpu & disk
+# use since I rarely use dovecot for most folders.
+mail_cache_max_size = 50M
+
+
# simple password file based login
!include conf.d/auth-passwdfile.conf.ext
# ian: %u is used for alerts user vs iank
-mail_location = maildir:/m/%u:LAYOUT=fs:INBOX=/m/%u/INBOX
-mail_uid = $u
-mail_gid = $u
+# https://doc.dovecot.org/configuration_manual/mail_location/Maildir/
+mail_location = maildir:/m/%u:LAYOUT=fs:INBOX=/m/%u/INBOX:INDEX=/var/dovecot-indexes/%u
+# note: i don't know if these need to be set, but this seems fine.
+mail_uid = iank
+mail_gid = iank
protocol lmtp {
# For a normal setup with exim, we need something like this, which
m mkdir -p $rctmpdir /m/rc
m chown -R www-data.www-data $rctmpdir /m/rc
m chmod 750 $rctmpdir
- # Ensure the log file monitored by fail2ban exists, or else fail2ban can't start.
# todo: check for other mailinabox things
+ # Ensure the log file monitored by fail2ban exists, or else fail2ban can't start.
m sudo -u www-data touch $rclogdir/errors.log
#### begin carddav install
u /usr/local/bin/ncup <<'EOFOUTER'
#!/bin/bash
-source /usr/local/lib/err
+source /usr/local/lib/bash-bear
m() { printf "%s\n" "$*"; "$@"; }
err-cleanup() {
# workarounds for broken debbugsconfig which is
# itself deprecated. this is temporary before I
# figure out how to install from git
-gunzip /usr/share/doc/debbugs/examples/text.gz
-mkdir -p /etc/debbugs/sources
+if [[ -e /usr/share/doc/debbugs/examples/text.gz ]]; then
+ gunzip /usr/share/doc/debbugs/examples/text.gz
+fi
+mkdir -p /etc/debbugs/indices
debbugsconfig
# ld for local debbugs
-/a/exe/web-conf -t -a 127.0.1.1 -p 80 -r /var/lib/debbugs/www - apache2 ld <<'EOF'
+/a/exe/web-conf -l -t -a 127.0.1.1 -p 80 -r /var/lib/debbugs/www - apache2 ld <<'EOF'
# copied from debbugs upstream example
<Directory /var/lib/debbugs/www>
Options Indexes SymLinksIfOwnerMatch MultiViews
domains = DEBBUGS_DOMAIN
EOF
+ install -m=0775 -d -g Debian-exim -o iank /var/spool/exim4/gw
u /etc/exim4/conf.d/router/155_delay <<'EOF'
# By default, delay sending email by 30-40 minutes in case I
# change my mind.
condition = ${if and { \
{< {$tod_epoch} {${eval10:$received_time + 60*30}}} \
{!def:h_i:} \
-{!bool{${lookup{$message_exim_id}lsearch{/etc/exim4/no-delay-eximids}{true}}}} \
-{!bool{${lookup{all}lsearch{/etc/exim4/no-delay-eximids}{true}}}} \
+{!bool{${lookup{$message_exim_id}lsearch{/var/spool/exim4/gw/.no-delay-eximids}{true}}}} \
+{!bool{${lookup{all}lsearch{/var/spool/exim4/gw/.no-delay-eximids}{true}}}} \
} {true}{false}}
headers_remove = <; i:
domains = ! +local_domains
# uncomment for testing delays to jtuttle
# local_parts = ! root : ! testignore : ! alerts : ! ian-pager : ! daylert
- local_parts = ! root : ! testignore : ! alerts : ! jtuttle : ! ian-pager : ! daylert
+ local_parts = ! root : ! testignore : ! alerts : ! jtuttle : ! ian-pager : ! daylert : ! r2e
ignore_target_hosts = ROUTER_DNSLOOKUP_IGNORE_TARGET_HOSTS
EOF
EOF
+ # ian: save a copy of sent mail. i thought of other ways to do this,
+ # for example, to only save sent mail that is not sent from my mail
+ # client which saves a copy by default, but in the end, it seems
+ # simplest to turn that off. We want to save external mail sent by
+ # smarthosts. However, there is one complication: encrypted
+ # mail. Saving it here just gets us an encrypted copy that we can't
+ # read. Soo, we could bcc ourselves: then we still have the
+ # annoyance that it is encrypted so we can't grep it. Or, we could
+ # hack emacs so that it sends us an unencrypted copy. Turns out that
+ # the emacs function which saves sent email can also send us a
+ # copy. But, then we have 3 copies: the encrypted copy exim saves,
+ # the unencrypted copy exim saves, and the copy emacs saves. Soo,
+ # we can emacs send a copy directly to the sent alias but only when
+ # it is not mail_host, and have the exim condition for redirecting a
+ # copy to the sent alias avoid doing it if it has an emacs user
+ # agent header.
u /etc/exim4/conf.d/router/186_sentarchive_nn <<'EOF'
-# ian: save a copy of sent mail. i thought of other ways to
-# do this, for example, to only save sent mail that is not sent
-# from my mail client which saves a copy by default, but in the
-# end, it seems simplest to turn that off. We want to save
-# external mail sent by smarthosts.
sentarchive_nn:
driver = redirect
domains = ! +local_domains
- condition = ${if !bool{${lookup{$local_part@$domain}lsearch{/etc/exim4/ignore-sent}{true}}}}
+ condition = ${if and {{!bool{${lookup{$local_part@$domain}lsearch{/etc/exim4/ignore-sent}{true}}}} {!match {$h_user-agent:}{emacs}}}}
data = vojdedIdNejyebni@b8.nz
unseen
EOF
# This name won\'t appear on From: lines of outgoing messages if rewriting is enabled.
echo iankelling.org > /etc/mailname
+ # mail default domain.
+ u /etc/mailutils.conf <<'EOF'
+address {
+ email-domain iankelling.org;
+};
+EOF
# mail.iankelling.org so local imap clients can connect with tls and
# when they happen to not be local.
EOF
# Bind to wghole to receive mailbackup.
- wgholeip=$(sed -rn 's/^ *Address *= *([^/]+).*/\1/p' /etc/wireguard/wghole.conf)
- cat >>/etc/exim4/update-exim4.conf.conf <<EOF
+ if [[ -e /etc/wireguard/wghole.conf ]]; then
+ wgholeip=$(sed -rn 's/^ *Address *= *([^/]+).*/\1/p' /etc/wireguard/wghole.conf)
+ cat >>/etc/exim4/update-exim4.conf.conf <<EOF
dc_other_hostnames='eximbackup.b8.nz'
dc_local_interfaces='127.0.0.1;::1;$wgholeip'
EOF
+ fi
# wghole & thus exim will fail to start without internet connectivity.
u /etc/systemd/system/exim4.service.d/backup.conf <<'EOF'
driver = redirect
domains = ! +local_domains
senders = <; *@fsf.org ; *@posteo.net
- condition = ${if !bool{${lookup{$local_part@$domain}lsearch{/etc/exim4/ignore-sent}{true}}}}
+ condition = ${if and {{!bool{${lookup{$local_part@$domain}lsearch{/etc/exim4/ignore-sent}{true}}}} {!match {$h_user-agent:}{emacs}}}}
data = vojdedIdNejyebni@b8.nz
unseen
EOF
u /etc/myexim4/conf.d/router/160_backup_redir <<'EOF'
backup_redir:
-driver = redirect
-# i dont email myself from my own machine much, so lets ignore that.
-domains = ! +local_domains
-senders = <; *@fsf.org ; *@posteo.net
-condition = ${if !bool{${lookup{$local_part@$domain}lsearch{/etc/exim4/ignore-sent}{true}}}}
-# b is just an arbirary short string
-data = b@eximbackup.b8.nz
-# note, to test this, i could temporarily allow testignore.
-# alerts avoids potential mail loop.
-local_parts = ! root : ! testignore : ! alerts : ! daylert
-unseen = true
-errors_to = alerts@iankelling.org
+ driver = redirect
+ # i dont email myself from my own machine much, so lets ignore that.
+ domains = ! +local_domains
+ senders = <; *@fsf.org ; *@posteo.net
+ condition = ${if and {{!bool{${lookup{$local_part@$domain}lsearch{/etc/exim4/ignore-sent}{true}}}} {!match {$h_user-agent:}{emacs}}}}
+ # b is just an arbirary short string
+ data = b@eximbackup.b8.nz
+ # note, to test this, i could temporarily allow testignore.
+ # alerts avoids potential mail loop.
+ local_parts = ! root : ! testignore : ! alerts : ! daylert
+ unseen = true
+ errors_to = alerts@iankelling.org
EOF
# for bk, we have a exim4in.service that will do this for us.
# if [[ ! $uid ]]; then
# # /a/opt/debbugs/debian/README.mail
# adduser --uid 610 --system --group --home /o/debbugs \
-# --no-create-home --disabled-login --force-badname debbugs
+ # --no-create-home --disabled-login --force-badname debbugs
# m find /o/debbugs -xdev -path ./var/tmp -prune -o -uid $uid -execdir chown -h 610 {} +
# m find /o/debbugs -xdev -path ./var/tmp -prune -o -gid $gid -execdir chgrp -h 610 {} +
# elif [[ $uid != 610 ]]; then
;;
esac
-# optimization, this only needs to run once.
-if [[ ! -e /etc/exim4/fullchain.pem ]]; then
- m /a/bin/ds/mail-cert-cron -1
+# optimization, this only needs to run once. But, if we move to a
+# computer we haven't used much, we need to fetch a fresh cert.
+# Existence check is just to avoid ugly error message from openssl.
+if [[ ! -e /etc/exim4/fullchain.pem ]] || ! openssl x509 -checkend $(( 60 * 60 * 24 * 3 )) -noout -in /etc/exim4/fullchain.pem; then
+ m /a/bin/ds/mail-cert-cron -1 -i
m systemctl --now enable mailcert.timer
fi
;;&
$MAIL_HOST|bk|je)
# start spamassassin/dovecot before exim.
- sre dovecot spamassassin
+ sre dovecot $spamd_ser
# Wait a bit before restarting exim, else I get a paniclog entry
# like: spam acl condition: all spamd servers failed. But I'm tired
# of waiting. I'll deal with this some other way.
:
;;
*)
- soff radicale mailclean.timer dovecot spamassassin $vpnser mailnn clamav-daemon
+ soff radicale mailclean.timer dovecot $spamd_ser $vpnser mailnn clamav-daemon
;;
esac
iankelling.org / git / distro-setup / blobdiff