131 lines
5.3 KiB
Bash
131 lines
5.3 KiB
Bash
#!/bin/bash
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# Support for Postfix features
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# Docs - virtual_mailbox_domains (Used in /etc/postfix/main.cf):
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# http://www.postfix.org/ADDRESS_CLASS_README.html#virtual_mailbox_class
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# http://www.postfix.org/VIRTUAL_README.html
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# > If you omit this setting then Postfix will reject mail (relay access denied) or will not be able to deliver it.
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# > NEVER list a virtual MAILBOX domain name as a `mydestination` domain!
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# > NEVER list a virtual MAILBOX domain name as a virtual ALIAS domain!
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#
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# > Execute the command "postmap /etc/postfix/virtual" after changing the virtual file,
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# > execute "postmap /etc/postfix/vmailbox" after changing the vmailbox file,
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# > and execute the command "postfix reload" after changing the main.cf file.
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#
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# - virtual_alias_domains is not used by docker-mailserver at present, although LDAP docs reference it.
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# - `postmap` only seems relevant when the lookup type is one of these `file_type` values: http://www.postfix.org/postmap.1.html
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# Should not be a concern for most types used by `docker-mailserver`: texthash, ldap, pcre, tcp, unionmap, unix.
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# The only other type in use by `docker-mailserver` is the hash type for /etc/aliases, which `postalias` handles.
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function _create_postfix_vhost() {
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# `main.cf` configures `virtual_mailbox_domains = /etc/postfix/vhost`
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# NOTE: Amavis also consumes this file.
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local DATABASE_VHOST='/etc/postfix/vhost'
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local TMP_VHOST='/tmp/vhost.postfix.tmp'
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_vhost_collect_postfix_domains
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_create_vhost
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}
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# Filter unique values into a proper DATABASE_VHOST config:
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function _create_vhost() {
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: >"${DATABASE_VHOST}"
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if [[ -f ${TMP_VHOST} ]]; then
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sort < "${TMP_VHOST}" | uniq >>"${DATABASE_VHOST}"
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rm "${TMP_VHOST}"
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fi
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}
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# Collects domains from configs (DATABASE_) into TMP_VHOST
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function _vhost_collect_postfix_domains() {
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local DATABASE_ACCOUNTS='/tmp/docker-mailserver/postfix-accounts.cf'
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local DATABASE_VIRTUAL='/tmp/docker-mailserver/postfix-virtual.cf'
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local DOMAIN UNAME
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# getting domains FROM mail accounts
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if [[ -f ${DATABASE_ACCOUNTS} ]]; then
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while IFS=$'|' read -r LOGIN _; do
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DOMAIN=$(echo "${LOGIN}" | cut -d @ -f2)
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echo "${DOMAIN}" >>"${TMP_VHOST}"
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done < <(_get_valid_lines_from_file "${DATABASE_ACCOUNTS}")
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fi
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# getting domains FROM mail aliases
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if [[ -f ${DATABASE_VIRTUAL} ]]; then
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while read -r FROM _; do
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UNAME=$(echo "${FROM}" | cut -d @ -f1)
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DOMAIN=$(echo "${FROM}" | cut -d @ -f2)
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# if they are equal it means the line looks like: "user1 other@domain.tld"
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[[ ${UNAME} != "${DOMAIN}" ]] && echo "${DOMAIN}" >>"${TMP_VHOST}"
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done < <(_get_valid_lines_from_file "${DATABASE_VIRTUAL}")
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fi
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_vhost_ldap_support
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}
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# Add DOMAINNAME (not an ENV, set by `helpers/dns.sh`) to vhost.
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# NOTE: `setup-stack.sh:_setup_ldap` has related logic:
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# - `main.cf:mydestination` setting removes `$mydestination` as an LDAP bugfix.
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# - `main.cf:virtual_mailbox_domains` uses `/etc/postfix/vhost`, but may
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# conditionally include a 2nd table (ldap:/etc/postfix/ldap-domains.cf).
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function _vhost_ldap_support() {
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[[ ${ACCOUNT_PROVISIONER} == 'LDAP' ]] && echo "${DOMAINNAME}" >>"${TMP_VHOST}"
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}
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# Docs - Postfix lookup table files:
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# http://www.postfix.org/DATABASE_README.html
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#
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# Types used in scripts or config: ldap, texthash, hash, pcre, tcp, unionmap, unix
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# ldap type changes are network based, no `postfix reload` required.
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# texthash type is read into memory when Postfix process starts, requires `postfix reload` to apply changes.
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# texthash type does not require running `postmap` after changes are made, other types might.
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#
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# Examples of different types actively used:
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# setup-stack.sh:_setup_spoof_protection uses texthash + hash + pcre, and conditionally unionmap
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# main.cf:
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# - alias_maps and alias_database both use hash:/etc/aliases
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# - virtual_mailbox_maps and virtual_alias_maps use texthash
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# - `alias.sh` may append pcre:/etc/postfix/regexp to virtual_alias_maps in `main.cf`
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#
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# /etc/aliases is handled by `alias.sh` and uses `postalias` to update the Postfix alias database. No need for `postmap`.
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# http://www.postfix.org/postalias.1.html
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# Add an key with an value to Postfix's main configuration file
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# or update an existing key. An already existing key can be updated
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# by either appending to the existing value (default) or by prepending.
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#
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# @param ${1} = key name in Postfix's main configuration file
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# @param ${2} = new value (appended or prepended)
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# @param ${3} = "append" (default) or "prepend" [OPTIONAL]
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function _add_to_or_update_postfix_main() {
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local KEY=${1:?Key name is required}
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local NEW_VALUE=${2:?New value is required}
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local ACTION=${3:-append}
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# If entry does not exist, add it - otherwise update with ACTION:
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if ! grep -q -E "^${KEY}" /etc/postfix/main.cf; then
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postconf "${KEY} = ${NEW_VALUE}"
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else
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KEY=$(_escape_for_sed "${KEY}")
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NEW_VALUE=$(_escape_for_sed "${NEW_VALUE}")
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local SED_STRING
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case "${ACTION}" in
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('append')
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SED_STRING="/${NEW_VALUE}/! s|^(${KEY} *=.*)|\1 ${NEW_VALUE}|g"
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;;
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('prepend')
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SED_STRING="/${NEW_VALUE}/! s|^(${KEY}) *= *(.*)|\1 = ${NEW_VALUE} \2|g"
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;;
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(*)
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_log 'error' "Action '${3}' in _add_to_or_update_postfix_main is unknown"
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return 1
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;;
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esac
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sed -i -E "${SED_STRING}" /etc/postfix/main.cf
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fi
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}
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