mailcow/data/Dockerfiles/postfix/postfix.sh
macwinnie b985ba4f0e Improve send-as behaviour
Receiving mails for wildcard alias addresses is really easy – but
sending mails from those any-aliases was not possible at all unless
every sender address was added as an explicit alias to the database.

By this change in the database query for allowed sender addresses, the
first finding `not NULL` (see [`SELECT COALESCE`](https://www.w3schools.com/sql/func_sqlserver_coalesce.asp) for how it works)
– either an exact alias `mailbox@domain.tld` or the wildcard alias `@domain.tld`
will be allowed to send mails as the given address ... without the need
of explicit definition within the database.
2022-08-04 01:37:26 +02:00

437 lines
13 KiB
Bash
Executable File

#!/bin/bash
trap "postfix stop" EXIT
[[ ! -d /opt/postfix/conf/sql/ ]] && mkdir -p /opt/postfix/conf/sql/
# Wait for MySQL to warm-up
while ! mysqladmin status --socket=/var/run/mysqld/mysqld.sock -u${DBUSER} -p${DBPASS} --silent; do
echo "Waiting for database to come up..."
sleep 2
done
until dig +short mailcow.email > /dev/null; do
echo "Waiting for DNS..."
sleep 1
done
cat <<EOF > /etc/aliases
# Autogenerated by mailcow
null: /dev/null
watchdog: /dev/null
ham: "|/usr/local/bin/rspamd-pipe-ham"
spam: "|/usr/local/bin/rspamd-pipe-spam"
EOF
newaliases;
# create sni configuration
if [[ "${SKIP_LETS_ENCRYPT}" =~ ^([yY][eE][sS]|[yY])+$ ]]; then
echo -n "" > /opt/postfix/conf/sni.map
else
echo -n "" > /opt/postfix/conf/sni.map;
for cert_dir in /etc/ssl/mail/*/ ; do
if [[ ! -f ${cert_dir}domains ]] || [[ ! -f ${cert_dir}cert.pem ]] || [[ ! -f ${cert_dir}key.pem ]]; then
continue;
fi
IFS=" " read -r -a domains <<< "$(cat "${cert_dir}domains")"
for domain in "${domains[@]}"; do
echo -n "${domain} ${cert_dir}key.pem ${cert_dir}cert.pem" >> /opt/postfix/conf/sni.map;
echo "" >> /opt/postfix/conf/sni.map;
done
done
fi
postmap -F hash:/opt/postfix/conf/sni.map;
cat <<EOF > /opt/postfix/conf/sql/mysql_relay_ne.cf
# Autogenerated by mailcow
user = ${DBUSER}
password = ${DBPASS}
hosts = unix:/var/run/mysqld/mysqld.sock
dbname = ${DBNAME}
query = SELECT IF(EXISTS(SELECT address, domain FROM alias
WHERE address = '%s'
AND domain IN (
SELECT domain FROM domain
WHERE backupmx = '1'
AND relay_all_recipients = '1'
AND relay_unknown_only = '1')
), 'lmtp:inet:dovecot:24', NULL) AS 'transport'
EOF
cat <<EOF > /opt/postfix/conf/sql/mysql_relay_recipient_maps.cf
# Autogenerated by mailcow
user = ${DBUSER}
password = ${DBPASS}
hosts = unix:/var/run/mysqld/mysqld.sock
dbname = ${DBNAME}
query = SELECT DISTINCT
CASE WHEN '%d' IN (
SELECT domain FROM domain
WHERE relay_all_recipients=1
AND domain='%d'
AND backupmx=1
)
THEN '%s' ELSE (
SELECT goto FROM alias WHERE address='%s' AND active='1'
)
END AS result;
EOF
cat <<EOF > /opt/postfix/conf/sql/mysql_tls_policy_override_maps.cf
# Autogenerated by mailcow
user = ${DBUSER}
password = ${DBPASS}
hosts = unix:/var/run/mysqld/mysqld.sock
dbname = ${DBNAME}
query = SELECT CONCAT(policy, ' ', parameters) AS tls_policy FROM tls_policy_override WHERE active = '1' AND dest = '%s'
EOF
cat <<EOF > /opt/postfix/conf/sql/mysql_tls_enforce_in_policy.cf
# Autogenerated by mailcow
user = ${DBUSER}
password = ${DBPASS}
hosts = unix:/var/run/mysqld/mysqld.sock
dbname = ${DBNAME}
query = SELECT IF(EXISTS(
SELECT 'TLS_ACTIVE' FROM alias
LEFT OUTER JOIN mailbox ON mailbox.username = alias.goto
WHERE (address='%s'
OR address IN (
SELECT CONCAT('%u', '@', target_domain) FROM alias_domain
WHERE alias_domain='%d'
)
) AND JSON_UNQUOTE(JSON_VALUE(attributes, '$.tls_enforce_in')) = '1' AND mailbox.active = '1'
), 'reject_plaintext_session', NULL) AS 'tls_enforce_in';
EOF
cat <<EOF > /opt/postfix/conf/sql/mysql_sender_dependent_default_transport_maps.cf
# Autogenerated by mailcow
user = ${DBUSER}
password = ${DBPASS}
hosts = unix:/var/run/mysqld/mysqld.sock
dbname = ${DBNAME}
query = SELECT GROUP_CONCAT(transport SEPARATOR '') AS transport_maps
FROM (
SELECT IF(EXISTS(SELECT 'smtp_type' FROM alias
LEFT OUTER JOIN mailbox ON mailbox.username = alias.goto
WHERE (address = '%s'
OR address IN (
SELECT CONCAT('%u', '@', target_domain) FROM alias_domain
WHERE alias_domain = '%d'
)
)
AND JSON_UNQUOTE(JSON_VALUE(attributes, '$.tls_enforce_out')) = '1'
AND mailbox.active = '1'
), 'smtp_enforced_tls:', 'smtp:') AS 'transport'
UNION ALL
SELECT COALESCE(
(SELECT hostname FROM relayhosts
LEFT OUTER JOIN mailbox ON JSON_UNQUOTE(JSON_VALUE(mailbox.attributes, '$.relayhost')) = relayhosts.id
WHERE relayhosts.active = '1'
AND (
mailbox.username IN (SELECT alias.goto from alias
JOIN mailbox ON mailbox.username = alias.goto
WHERE alias.active = '1'
AND alias.address = '%s'
AND alias.address NOT LIKE '@%%'
)
)
),
(SELECT hostname FROM relayhosts
LEFT OUTER JOIN domain ON domain.relayhost = relayhosts.id
WHERE relayhosts.active = '1'
AND (domain.domain = '%d'
OR domain.domain IN (
SELECT target_domain FROM alias_domain
WHERE alias_domain = '%d'
)
)
)
)
) AS transport_view;
EOF
cat <<EOF > /opt/postfix/conf/sql/mysql_transport_maps.cf
# Autogenerated by mailcow
user = ${DBUSER}
password = ${DBPASS}
hosts = unix:/var/run/mysqld/mysqld.sock
dbname = ${DBNAME}
query = SELECT CONCAT('smtp_via_transport_maps:', nexthop) AS transport FROM transports
WHERE active = '1'
AND destination = '%s';
EOF
cat <<EOF > /opt/postfix/conf/sql/mysql_virtual_resource_maps.cf
# Autogenerated by mailcow
user = ${DBUSER}
password = ${DBPASS}
hosts = unix:/var/run/mysqld/mysqld.sock
dbname = ${DBNAME}
query = SELECT 'null@localhost' FROM mailbox
WHERE kind REGEXP 'location|thing|group' AND username = '%s';
EOF
cat <<EOF > /opt/postfix/conf/sql/mysql_sasl_passwd_maps_sender_dependent.cf
# Autogenerated by mailcow
user = ${DBUSER}
password = ${DBPASS}
hosts = unix:/var/run/mysqld/mysqld.sock
dbname = ${DBNAME}
query = SELECT CONCAT_WS(':', username, password) AS auth_data FROM relayhosts
WHERE id IN (
SELECT COALESCE(
(SELECT id FROM relayhosts
LEFT OUTER JOIN domain ON domain.relayhost = relayhosts.id
WHERE relayhosts.active = '1'
AND (domain.domain = '%d'
OR domain.domain IN (
SELECT target_domain FROM alias_domain
WHERE alias_domain = '%d'
)
)
),
(SELECT id FROM relayhosts
LEFT OUTER JOIN mailbox ON JSON_UNQUOTE(JSON_VALUE(mailbox.attributes, '$.relayhost')) = relayhosts.id
WHERE relayhosts.active = '1'
AND (
mailbox.username IN (
SELECT alias.goto from alias
JOIN mailbox ON mailbox.username = alias.goto
WHERE alias.active = '1'
AND alias.address = '%s'
AND alias.address NOT LIKE '@%%'
)
)
)
)
)
AND active = '1'
AND username != '';
EOF
cat <<EOF > /opt/postfix/conf/sql/mysql_sasl_passwd_maps_transport_maps.cf
# Autogenerated by mailcow
user = ${DBUSER}
password = ${DBPASS}
hosts = unix:/var/run/mysqld/mysqld.sock
dbname = ${DBNAME}
query = SELECT CONCAT_WS(':', username, password) AS auth_data FROM transports
WHERE nexthop = '%s'
AND active = '1'
AND username != ''
LIMIT 1;
EOF
cat <<EOF > /opt/postfix/conf/sql/mysql_virtual_alias_domain_maps.cf
# Autogenerated by mailcow
user = ${DBUSER}
password = ${DBPASS}
hosts = unix:/var/run/mysqld/mysqld.sock
dbname = ${DBNAME}
query = SELECT username FROM mailbox, alias_domain
WHERE alias_domain.alias_domain = '%d'
AND mailbox.username = CONCAT('%u', '@', alias_domain.target_domain)
AND (mailbox.active = '1' OR mailbox.active = '2')
AND alias_domain.active='1'
EOF
cat <<EOF > /opt/postfix/conf/sql/mysql_virtual_alias_maps.cf
# Autogenerated by mailcow
user = ${DBUSER}
password = ${DBPASS}
hosts = unix:/var/run/mysqld/mysqld.sock
dbname = ${DBNAME}
query = SELECT goto FROM alias
WHERE address='%s'
AND (active='1' OR active='2');
EOF
cat <<EOF > /opt/postfix/conf/sql/mysql_recipient_bcc_maps.cf
# Autogenerated by mailcow
user = ${DBUSER}
password = ${DBPASS}
hosts = unix:/var/run/mysqld/mysqld.sock
dbname = ${DBNAME}
query = SELECT bcc_dest FROM bcc_maps
WHERE local_dest='%s'
AND type='rcpt'
AND active='1';
EOF
cat <<EOF > /opt/postfix/conf/sql/mysql_sender_bcc_maps.cf
# Autogenerated by mailcow
user = ${DBUSER}
password = ${DBPASS}
hosts = unix:/var/run/mysqld/mysqld.sock
dbname = ${DBNAME}
query = SELECT bcc_dest FROM bcc_maps
WHERE local_dest='%s'
AND type='sender'
AND active='1';
EOF
cat <<EOF > /opt/postfix/conf/sql/mysql_recipient_canonical_maps.cf
# Autogenerated by mailcow
user = ${DBUSER}
password = ${DBPASS}
hosts = unix:/var/run/mysqld/mysqld.sock
dbname = ${DBNAME}
query = SELECT new_dest FROM recipient_maps
WHERE old_dest='%s'
AND active='1';
EOF
cat <<EOF > /opt/postfix/conf/sql/mysql_virtual_domains_maps.cf
# Autogenerated by mailcow
user = ${DBUSER}
password = ${DBPASS}
hosts = unix:/var/run/mysqld/mysqld.sock
dbname = ${DBNAME}
query = SELECT alias_domain from alias_domain WHERE alias_domain='%s' AND active='1'
UNION
SELECT domain FROM domain
WHERE domain='%s'
AND active = '1'
AND backupmx = '0'
EOF
cat <<EOF > /opt/postfix/conf/sql/mysql_virtual_mailbox_maps.cf
# Autogenerated by mailcow
user = ${DBUSER}
password = ${DBPASS}
hosts = unix:/var/run/mysqld/mysqld.sock
dbname = ${DBNAME}
query = SELECT CONCAT(JSON_UNQUOTE(JSON_VALUE(attributes, '$.mailbox_format')), mailbox_path_prefix, '%d/%u/') FROM mailbox WHERE username='%s' AND (active = '1' OR active = '2')
EOF
cat <<EOF > /opt/postfix/conf/sql/mysql_virtual_relay_domain_maps.cf
# Autogenerated by mailcow
user = ${DBUSER}
password = ${DBPASS}
hosts = unix:/var/run/mysqld/mysqld.sock
dbname = ${DBNAME}
query = SELECT domain FROM domain WHERE domain='%s' AND backupmx = '1' AND active = '1'
EOF
cat <<EOF > /opt/postfix/conf/sql/mysql_virtual_sender_acl.cf
# Autogenerated by mailcow
user = ${DBUSER}
password = ${DBPASS}
hosts = unix:/var/run/mysqld/mysqld.sock
dbname = ${DBNAME}
# First select queries domain and alias_domain to determine if domains are active.
query = SELECT goto FROM alias
WHERE id IN (
SELECT COALESCE (
(
SELECT id FROM alias
WHERE address='%s'
AND (active='1' OR active='2')
), (
SELECT id FROM alias
WHERE address='@%d'
AND (active='1' OR active='2')
)
)
)
AND active='1'
AND (domain IN
(SELECT domain FROM domain
WHERE domain='%d'
AND active='1')
OR domain in (
SELECT alias_domain FROM alias_domain
WHERE alias_domain='%d'
AND active='1'
)
)
UNION
SELECT logged_in_as FROM sender_acl
WHERE send_as='@%d'
OR send_as='%s'
OR send_as='*'
OR send_as IN (
SELECT CONCAT('@',target_domain) FROM alias_domain
WHERE alias_domain = '%d')
OR send_as IN (
SELECT CONCAT('%u','@',target_domain) FROM alias_domain
WHERE alias_domain = '%d')
AND logged_in_as NOT IN (
SELECT goto FROM alias
WHERE address='%s')
UNION
SELECT username FROM mailbox, alias_domain
WHERE alias_domain.alias_domain = '%d'
AND mailbox.username = CONCAT('%u','@',alias_domain.target_domain)
AND (mailbox.active = '1' OR mailbox.active ='2')
AND alias_domain.active='1';
EOF
# MX based routing
cat <<EOF > /opt/postfix/conf/sql/mysql_mbr_access_maps.cf
# Autogenerated by mailcow
user = ${DBUSER}
password = ${DBPASS}
hosts = unix:/var/run/mysqld/mysqld.sock
dbname = ${DBNAME}
query = SELECT CONCAT('FILTER smtp_via_transport_maps:', nexthop) as transport FROM transports
WHERE '%s' REGEXP destination
AND active='1'
AND is_mx_based='1';
EOF
cat <<EOF > /opt/postfix/conf/sql/mysql_virtual_spamalias_maps.cf
# Autogenerated by mailcow
user = ${DBUSER}
password = ${DBPASS}
hosts = unix:/var/run/mysqld/mysqld.sock
dbname = ${DBNAME}
query = SELECT goto FROM spamalias
WHERE address='%s'
AND validity >= UNIX_TIMESTAMP()
EOF
sed -i '/User overrides/q' /opt/postfix/conf/main.cf
echo >> /opt/postfix/conf/main.cf
touch /opt/postfix/conf/extra.cf
sed -i '/myhostname/d' /opt/postfix/conf/extra.cf
echo -e "myhostname = ${MAILCOW_HOSTNAME}\n$(cat /opt/postfix/conf/extra.cf)" > /opt/postfix/conf/extra.cf
cat /opt/postfix/conf/extra.cf >> /opt/postfix/conf/main.cf
if [ ! -f /opt/postfix/conf/custom_transport.pcre ]; then
echo "Creating dummy custom_transport.pcre"
touch /opt/postfix/conf/custom_transport.pcre
fi
if [[ ! -f /opt/postfix/conf/custom_postscreen_whitelist.cidr ]]; then
echo "Creating dummy custom_postscreen_whitelist.cidr"
cat <<EOF > /opt/postfix/conf/custom_postscreen_whitelist.cidr
# Autogenerated by mailcow
# Rules are evaluated in the order as specified.
# Blacklist 192.168.* except 192.168.0.1.
# 192.168.0.1 permit
# 192.168.0.0/16 reject
EOF
fi
# Fix Postfix permissions
chown -R root:postfix /opt/postfix/conf/sql/ /opt/postfix/conf/custom_transport.pcre
chmod 640 /opt/postfix/conf/sql/*.cf /opt/postfix/conf/custom_transport.pcre
chgrp -R postdrop /var/spool/postfix/public
chgrp -R postdrop /var/spool/postfix/maildrop
postfix set-permissions
# Check Postfix configuration
postconf -c /opt/postfix/conf > /dev/null
if [[ $? != 0 ]]; then
echo "Postfix configuration error, refusing to start."
exit 1
else
postfix -c /opt/postfix/conf start
sleep 126144000
fi