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-#!/bin/sh
-
-# THE SETUP
-
-# Mail will be stored in non-retarded Maildirs because it's $currentyear. This
-# makes it easier for use with isync, which is what I care about so I can have
-# an offline repo of mail.
-
-# The mailbox names are: Inbox, Sent, Drafts, Archive, Junk, Trash
-
-# Use the typical unix login system for mail users. Users will log into their
-# email with their passnames on the server. No usage of a redundant mySQL
-# database to do this.
-
-# DEPENDENCIES BEFORE RUNNING
-
-# 1. Have a Debian system with a static IP and all that. Pretty much any
-# default VPS offered by a company will have all the basic stuff you need. This
-# script might run on Ubuntu as well. Haven't tried it. If you have, tell me
-# what happens.
-
-# 2. Have a Let's Encrypt SSL certificate for $maildomain. You might need one
-# for $domain as well, but they're free with Let's Encypt so you should have
-# them anyway.
-
-# 3. If you've been toying around with your server settings trying to get
-# postfix/dovecot/etc. working before running this, I recommend you `apt purge`
-# everything first because this script is build on top of only the defaults.
-# Clear out /etc/postfix and /etc/dovecot yourself if needbe.
-
-# NOTE WHILE INSTALLING
-
-# On installation of Postfix, select "Internet Site" and put in TLD (without
-# `mail.` before it).
-
-echo "Installing programs..."
-pacman -S postfix dovecot opendkim spamassassin pigeonhole
-# Check if OpenDKIM is installed and install it if not.
-which opendkim-genkey >/dev/null 2>&1 || pacman -S opendkim-tools
-[ -e /etc/mailname ] || echo "Could not find a mailname in /etc/" && exit 1
-domain="$(cat /etc/mailname)"
-subdom=${MAIL_SUBDOM:-mail}
-maildomain="$subdom.$domain"
-certdir="/etc/letsencrypt/live/$maildomain"
-
-[ ! -d "$certdir" ] && certdir="$(dirname "$(certbot certificates 2>/dev/null | grep "$maildomain\|*.$domain" -A 2 | awk '/Certificate Path/ {print $3}' | head -n1)")"
-
-[ ! -d "$certdir" ] && echo "Note! You must first have a Let's Encrypt Certbot HTTPS/SSL Certificate for $maildomain.
-
-Use Let's Encrypt's Certbot to get that and then rerun this script.
-
-You may need to set up a dummy $maildomain site in nginx or Apache for that to work." && exit 1
-
-# NOTE ON POSTCONF COMMANDS
-
-# The `postconf` command literally just adds the line in question to
-# /etc/postfix/main.cf so if you need to debug something, go there. It replaces
-# any other line that sets the same setting, otherwise it is appended to the
-# end of the file.
-
-echo "Configuring Postfix's main.cf..."
-
-# Change the cert/key files to the default locations of the Let's Encrypt cert/key
-postconf -e "smtpd_tls_key_file=$certdir/privkey.pem"
-postconf -e "smtpd_tls_cert_file=$certdir/fullchain.pem"
-postconf -e "smtp_tls_CAfile=$certdir/cert.pem"
-
-# Enable, but do not require TLS. Requiring it with other server would cause
-# mail delivery problems and requiring it locally would cause many other
-# issues.
-postconf -e "smtpd_tls_security_level = may"
-postconf -e "smtp_tls_security_level = may"
-
-# TLS required for authentication.
-postconf -e "smtpd_tls_auth_only = yes"
-
-# Exclude obsolete, insecure and obsolete encryption protocols.
-postconf -e "smtpd_tls_mandatory_protocols = !SSLv2, !SSLv3, !TLSv1, !TLSv1.1"
-postconf -e "smtp_tls_mandatory_protocols = !SSLv2, !SSLv3, !TLSv1, !TLSv1.1"
-postconf -e "smtpd_tls_protocols = !SSLv2, !SSLv3, !TLSv1, !TLSv1.1"
-postconf -e "smtp_tls_protocols = !SSLv2, !SSLv3, !TLSv1, !TLSv1.1"
-
-# Exclude suboptimal ciphers.
-postconf -e "tls_preempt_cipherlist = yes"
-postconf -e "smtpd_tls_exclude_ciphers = aNULL, LOW, EXP, MEDIUM, ADH, AECDH, MD5, DSS, ECDSA, CAMELLIA128, 3DES, CAMELLIA256, RSA+AES, eNULL"
-
-
-# Here we tell Postfix to look to Dovecot for authenticating users/passwords.
-# Dovecot will be putting an authentication socket in /var/spool/postfix/private/auth
-postconf -e "smtpd_sasl_auth_enable = yes"
-postconf -e "smtpd_sasl_type = dovecot"
-postconf -e "smtpd_sasl_path = private/auth"
-
-# Sender and recipient restrictions
-postconf -e "smtpd_recipient_restrictions = permit_sasl_authenticated, permit_mynetworks, reject_unauth_destination"
-
-# NOTE: the trailing slash here, or for any directory name in the home_mailbox
-# command, is necessary as it distinguishes a maildir (which is the actual
-# directories that what we want) from a spoolfile (which is what old unix
-# boomers want and no one else).
-postconf -e "home_mailbox = Mail/Inbox/"
-
-# master.cf
-echo "Configuring Postfix's master.cf..."
-
-sed -i "/^\s*-o/d;/^\s*submission/d;/^\s*smtp/d" /etc/postfix/master.cf
-
-echo "smtp unix - - n - - smtp
-smtp inet n - y - - smtpd
- -o content_filter=spamassassin
-submission inet n - y - - smtpd
- -o syslog_name=postfix/submission
- -o smtpd_tls_security_level=encrypt
- -o smtpd_sasl_auth_enable=yes
- -o smtpd_tls_auth_only=yes
-smtps inet n - y - - smtpd
- -o syslog_name=postfix/smtps
- -o smtpd_tls_wrappermode=yes
- -o smtpd_sasl_auth_enable=yes
-spamassassin unix - n n - - pipe
- user=spamd argv=/usr/bin/vendor_perl/spamc -f -e /usr/sbin/sendmail -oi -f \${sender} \${recipient}" >> /etc/postfix/master.cf
-
-
-# By default, dovecot has a bunch of configs in /etc/dovecot/conf.d/ These
-# files have nice documentation if you want to read it, but it's a huge pain to
-# go through them to organize. Instead, we simply overwrite
-# /etc/dovecot/dovecot.conf because it's easier to manage. You can get a backup
-# of the original in /usr/share/dovecot if you want.
-
-[ -d "/etc/dovecot" ] || mkdir /etc/dovecot
-cp /usr/share/doc/dovecot/example-config/dovecot.conf /etc/dovecot/dovecot.conf
-cp -r /usr/share/doc/dovecot/example-config/conf.d /etc/dovecot
-mv /etc/dovecot/dovecot.conf /etc/dovecot/dovecot.backup.conf
-
-echo "Creating Dovecot config..."
-
-openssl dhparam -out /etc/dovecot/dh.pem 4096
-
-echo "# Dovecot config
-# Note that in the dovecot conf, you can use:
-# %u for username
-# %n for the name in name@domain.tld
-# %d for the domain
-# %h the user's home directory
-
-# If you're not a brainlet, SSL must be set to required.
-ssl = required
-ssl_cert = <$certdir/fullchain.pem
-ssl_key = <$certdir/privkey.pem
-ssl_min_protocol = TLSv1.2
-ssl_cipher_list = EECDH+ECDSA+AESGCM:EECDH+aRSA+AESGCM:EECDH+ECDSA+SHA256:EECDH+aRSA+SHA256:EECDH+ECDSA+SHA384:EECDH+ECDSA+SHA256:EECDH+aRSA+SHA384:EDH+aRSA+AESGCM:EDH+aRSA+SHA256:EDH+aRSA:EECDH:!aNULL:!eNULL:!MEDIUM:!LOW:!3DES:!MD5:!EXP:!PSK:!SRP:!DSS:!RC4:!SEED
-ssl_prefer_server_ciphers = yes
-ssl_dh = </etc/dovecot/dh.pem
-# Plaintext login. This is safe and easy thanks to SSL.
-auth_mechanisms = plain login
-auth_username_format = %n
-
-protocols = \$protocols imap
-
-# Search for valid users in /etc/passwd
-userdb {
- driver = passwd
-}
-#Fallback: Use plain old PAM to find user passwords
-passdb {
- driver = pam
-}
-
-# Our mail for each user will be in ~/Mail, and the inbox will be ~/Mail/Inbox
-# The LAYOUT option is also important because otherwise, the boxes will be \`.Sent\` instead of \`Sent\`.
-mail_location = maildir:~/Mail:INBOX=~/Mail/Inbox:LAYOUT=fs
-namespace inbox {
- inbox = yes
- mailbox Drafts {
- special_use = \\Drafts
- auto = subscribe
-}
- mailbox Junk {
- special_use = \\Junk
- auto = subscribe
- autoexpunge = 30d
-}
- mailbox Sent {
- special_use = \\Sent
- auto = subscribe
-}
- mailbox Trash {
- special_use = \\Trash
-}
- mailbox Archive {
- special_use = \\Archive
-}
-}
-
-# Here we let Postfix use Dovecot's authetication system.
-
-service auth {
- unix_listener /var/spool/postfix/private/auth {
- mode = 0660
- user = postfix
- group = postfix
-}
-}
-
-protocol lda {
- mail_plugins = \$mail_plugins sieve
-}
-
-protocol lmtp {
- mail_plugins = \$mail_plugins sieve
-}
-
-plugin {
- sieve = ~/.dovecot.sieve
- sieve_default = /var/lib/dovecot/sieve/default.sieve
- #sieve_global_path = /var/lib/dovecot/sieve/default.sieve
- sieve_dir = ~/.sieve
- sieve_global_dir = /var/lib/dovecot/sieve/
-}
-" > /etc/dovecot/dovecot.conf
-
-# If using an old version of Dovecot, remove the ssl_dl line.
-case "$(dovecot --version)" in
- 1|2.1*|2.2*) sed -i "/^ssl_dh/d" /etc/dovecot/dovecot.conf ;;
-esac
-
-mkdir -p /var/lib/dovecot/sieve/
-
-echo "require [\"fileinto\", \"mailbox\"];
-if header :contains \"X-Spam-Flag\" \"YES\"
- {
- fileinto \"Junk\";
- }" > /var/lib/dovecot/sieve/default.sieve
-
-grep -q "^vmail:" /etc/passwd || useradd vmail
-chown -R vmail:vmail /var/lib/dovecot
-sievec /var/lib/dovecot/sieve/default.sieve
-
-echo "Preparing user authentication..."
-grep -q nullok /etc/pam.d/dovecot ||
-echo "auth required pam_unix.so nullok
-account required pam_unix.so" >> /etc/pam.d/dovecot
-
-# OpenDKIM
-
-# A lot of the big name email services, like Google, will automatically reject
-# as spam unfamiliar and unauthenticated email addresses. As in, the server
-# will flatly reject the email, not even delivering it to someone's Spam
-# folder.
-
-# OpenDKIM is a way to authenticate your email so you can send to such services
-# without a problem.
-
-# Create an OpenDKIM key in the proper place with proper permissions.
-echo "Generating OpenDKIM keys..."
-mkdir -p /etc/postfix/dkim
-opendkim-genkey -D /etc/postfix/dkim/ -d "$domain" -s "$subdom"
-chmod g+r /etc/postfix/dkim/*
-
-# Generate the OpenDKIM info:
-echo "Configuring OpenDKIM..."
-cp /usr/share/doc/opendkim/opendkim.conf.sample /etc/opendkim/opendkim.conf
-grep -q "$domain" /etc/postfix/dkim/keytable 2>/dev/null ||
-echo "$subdom._domainkey.$domain $domain:$subdom:/etc/postfix/dkim/$subdom.private" >> /etc/postfix/dkim/keytable
-
-grep -q "$domain" /etc/postfix/dkim/signingtable 2>/dev/null ||
-echo "*@$domain $subdom._domainkey.$domain" >> /etc/postfix/dkim/signingtable
-
-grep -q "127.0.0.1" /etc/postfix/dkim/trustedhosts 2>/dev/null ||
- echo "127.0.0.1
-10.1.0.0/16
-1.2.3.4/24" >> /etc/postfix/dkim/trustedhosts
-
-# ...and source it from opendkim.conf
-grep -q "^KeyTable" /etc/opendkim/opendkim.conf 2>/dev/null || echo "KeyTable file:/etc/postfix/dkim/keytable
-SigningTable refile:/etc/postfix/dkim/signingtable
-InternalHosts refile:/etc/postfix/dkim/trustedhosts" >> /etc/opendkim/opendkim.conf
-
-sed -i '/^#Canonicalization/s/simple/relaxed\/simple/' /etc/opendkim/opendkim.conf
-sed -i '/^#Canonicalization/s/^#//' /etc/opendkim/opendkim.conf
-
-sed -i '/Socket/s/^#*/#/' /etc/opendkim/opendkim.conf
-grep -q "^Socket\s*inet:12301@localhost" /etc/opendkim/opendkim.conf || echo "Socket inet:12301@localhost" >> /etc/opendkim/opendkim.conf
-
-# Here we add to postconf the needed settings for working with OpenDKIM
-echo "Configuring Postfix with OpenDKIM settings..."
-postconf -e "smtpd_sasl_security_options = noanonymous, noplaintext"
-postconf -e "smtpd_sasl_tls_security_options = noanonymous"
-postconf -e "myhostname = $domain"
-postconf -e "milter_default_action = accept"
-postconf -e "milter_protocol = 6"
-postconf -e "smtpd_milters = inet:127.0.0.1:12301"
-postconf -e "non_smtpd_milters = inet:127.0.0.1:12301"
-postconf -e "mailbox_command = /usr/lib/dovecot/deliver"
-
-systemctl daemon-reload
-
-for x in spamassassin opendkim dovecot postfix; do
- printf "Restarting %s..." "$x"
- systemctl enable --now "$x" && printf " ...done\\n"
-done
-
-# If ufw is used, enable the mail ports.
-ufw status | grep -qw active && { ufw allow 993; ufw allow 465 ; ufw allow 587; ufw allow 25 ;}
-
-pval="$(tr -d "\n" </etc/postfix/dkim/$subdom.txt | sed "s/k=rsa.* \"p=/k=rsa; p=/;s/\"\s*\"//;s/\"\s*).*//" | grep -o "p=.*")"
-dkimentry="$subdom._domainkey.$domain TXT v=DKIM1; k=rsa; $pval"
-dmarcentry="_dmarc.$domain TXT v=DMARC1; p=reject; rua=mailto:dmarc@$domain; fo=1"
-spfentry="@ TXT v=spf1 mx a:$maildomain -all"
-
-useradd -m -G mail dmarc
-
-echo "$dkimentry
-$dmarcentry
-$spfentry" > "$HOME/dns_emailwizard"
-
-printf "\033[31m
- _ _
-| \ | | _____ ___
-| \| |/ _ \ \ /\ / (_)
-| |\ | (_) \ V V / _
-|_| \_|\___/ \_/\_/ (_)\033[0m
-
-Add these three records to your DNS TXT records on either your registrar's site
-or your DNS server:
-\033[32m
-$dkimentry
-
-$dmarcentry
-
-$spfentry
-\033[0m
-NOTE: You may need to omit the \`.$domain\` portion at the beginning if
-inputting them in a registrar's web interface.
-
-Also, these are now saved to \033[34m~/dns_emailwizard\033[0m in case you want them in a file.
-
-Once you do that, you're done! Check the README for how to add users/accounts
-and how to log in."