SET client_encoding = 'UTF8';
SET client_min_messages = warning;
CREATE SEQUENCE transport_id;
CREATE SEQUENCE mailboxformat_id;
CREATE SEQUENCE maillocation_id;
CREATE SEQUENCE quotalimit_id;
CREATE SEQUENCE service_set_id;
CREATE SEQUENCE domain_gid
START WITH 70000
INCREMENT BY 1
MINVALUE 70000
MAXVALUE 4294967294
NO CYCLE;
CREATE SEQUENCE users_uid
START WITH 70000
INCREMENT BY 1
MINVALUE 70000
MAXVALUE 4294967294
NO CYCLE;
CREATE TABLE transport (
tid bigint NOT NULL DEFAULT nextval('transport_id'),
transport varchar(270) NOT NULL, -- smtps:[255-char.host.name:50025]
CONSTRAINT pkey_transport PRIMARY KEY (tid),
CONSTRAINT ukey_transport UNIQUE (transport)
);
-- Insert default transport
INSERT INTO transport(transport) VALUES ('dovecot:');
CREATE TABLE mailboxformat (
fid bigint NOT NULL DEFAULT nextval('mailboxformat_id'),
format varchar(20) NOT NULL,
CONSTRAINT pkey_mailboxformat PRIMARY KEY (fid),
CONSTRAINT ukey_mailboxformat UNIQUE (format)
);
-- Insert supported mailbox formats
INSERT INTO mailboxformat(format) VALUES ('maildir');
INSERT INTO mailboxformat(format) VALUES ('mdbox');
INSERT INTO mailboxformat(format) VALUES ('sdbox');
CREATE TABLE maillocation (
mid bigint NOT NULL DEFAULT nextval('maillocation_id'),
fid bigint NOT NULL DEFAULT 1,
directory varchar(20) NOT NULL,
extra varchar(1024),
CONSTRAINT pkey_maillocation PRIMARY KEY (mid),
CONSTRAINT fkey_maillocation_fid_mailboxformat FOREIGN KEY (fid)
REFERENCES mailboxformat (fid)
);
-- Insert default Maildir-folder name
INSERT INTO maillocation(directory) VALUES ('Maildir');
CREATE TABLE quotalimit (
qid bigint NOT NULL DEFAULT nextval('quotalimit_id'),
bytes bigint NOT NULL,
messages integer NOT NULL DEFAULT 0,
CONSTRAINT pkey_quotalimit PRIMARY KEY (qid),
CONSTRAINT ukey_quotalimit UNIQUE (bytes, messages)
);
-- Insert default (non) quota limit
INSERT INTO quotalimit(bytes, messages) VALUES (0, 0);
CREATE TABLE service_set (
ssid bigint NOT NULL DEFAULT nextval('service_set_id'),
smtp boolean NOT NULL DEFAULT TRUE,
pop3 boolean NOT NULL DEFAULT TRUE,
imap boolean NOT NULL DEFAULT TRUE,
sieve boolean NOT NULL DEFAULT TRUE,
CONSTRAINT pkey_service_set PRIMARY KEY (ssid),
CONSTRAINT ukey_service_set UNIQUE (smtp, pop3, imap, sieve)
);
-- Insert all possible service combinations
COPY service_set (smtp, pop3, imap, sieve) FROM stdin;
TRUE TRUE TRUE TRUE
FALSE TRUE TRUE TRUE
TRUE FALSE TRUE TRUE
FALSE FALSE TRUE TRUE
TRUE TRUE FALSE TRUE
FALSE TRUE FALSE TRUE
TRUE FALSE FALSE TRUE
FALSE FALSE FALSE TRUE
TRUE TRUE TRUE FALSE
FALSE TRUE TRUE FALSE
TRUE FALSE TRUE FALSE
FALSE FALSE TRUE FALSE
TRUE TRUE FALSE FALSE
FALSE TRUE FALSE FALSE
TRUE FALSE FALSE FALSE
FALSE FALSE FALSE FALSE
\.
CREATE TABLE domain_data (
gid bigint NOT NULL DEFAULT nextval('domain_gid'),
qid bigint NOT NULL DEFAULT 1, -- default quota limit
ssid bigint NOT NULL DEFAULT 1, -- default service set
tid bigint NOT NULL DEFAULT 1, -- default transport
domaindir varchar(40) NOT NULL, --/srv/mail/$RAND/4294967294
note text NULL DEFAULT NULL,
CONSTRAINT pkey_domain_data PRIMARY KEY (gid),
CONSTRAINT fkey_domain_data_qid_quotalimit FOREIGN KEY (qid)
REFERENCES quotalimit (qid),
CONSTRAINT fkey_domain_data_ssid_service_set FOREIGN KEY (ssid)
REFERENCES service_set (ssid),
CONSTRAINT fkey_domain_data_tid_transport FOREIGN KEY (tid)
REFERENCES transport (tid)
);
CREATE TABLE domain_name (
domainname varchar(255) NOT NULL,
gid bigint NOT NULL,
is_primary boolean NOT NULL,
CONSTRAINT pkey_domain_name PRIMARY KEY (domainname),
CONSTRAINT fkey_domain_name_gid_domain_data FOREIGN KEY (gid)
REFERENCES domain_data (gid)
);
CREATE TABLE users (
local_part varchar(64) NOT NULL,-- only localpart w/o '@'
passwd varchar(270) NOT NULL,
name varchar(128) NULL,
uid bigint NOT NULL DEFAULT nextval('users_uid'),
gid bigint NOT NULL,
mid bigint NOT NULL DEFAULT 1,
qid bigint NULL DEFAULT NULL,
ssid bigint NULL DEFAULT NULL,
tid bigint NULL DEFAULT NULL,
note text NULL DEFAULT NULL,
CONSTRAINT pkey_users PRIMARY KEY (local_part, gid),
CONSTRAINT ukey_users_uid UNIQUE (uid),
CONSTRAINT fkey_users_gid_domain_data FOREIGN KEY (gid)
REFERENCES domain_data (gid),
CONSTRAINT fkey_users_mid_maillocation FOREIGN KEY (mid)
REFERENCES maillocation (mid),
CONSTRAINT fkey_users_qid_quotalimit FOREIGN KEY (qid)
REFERENCES quotalimit (qid),
CONSTRAINT fkey_users_ssid_service_set FOREIGN KEY (ssid)
REFERENCES service_set (ssid),
CONSTRAINT fkey_users_tid_transport FOREIGN KEY (tid)
REFERENCES transport (tid)
);
CREATE TABLE userquota (
uid bigint NOT NULL,
bytes bigint NOT NULL DEFAULT 0,
messages integer NOT NULL DEFAULT 0,
CONSTRAINT pkey_userquota PRIMARY KEY (uid),
CONSTRAINT fkey_userquota_uid_users FOREIGN KEY (uid)
REFERENCES users (uid) ON DELETE CASCADE
);
CREATE TABLE alias (
gid bigint NOT NULL,
address varchar(64) NOT NULL,-- only localpart w/o '@'
destination varchar(320) NOT NULL,
CONSTRAINT pkey_alias PRIMARY KEY (gid, address, destination),
CONSTRAINT fkey_alias_gid_domain_data FOREIGN KEY (gid)
REFERENCES domain_data (gid)
);
CREATE TABLE relocated (
gid bigint NOT NULL,
address varchar(64) NOT NULL,
destination varchar(320) NOT NULL,
CONSTRAINT pkey_relocated PRIMARY KEY (gid, address),
CONSTRAINT fkey_relocated_gid_domain_data FOREIGN KEY (gid)
REFERENCES domain_data (gid)
);
CREATE TABLE catchall (
gid bigint NOT NULL,
destination varchar(320) NOT NULL,
CONSTRAINT pkey_catchall PRIMARY KEY (gid, destination),
CONSTRAINT fkey_catchall_gid_domain_data FOREIGN KEY (gid)
REFERENCES domain_data (gid)
);
CREATE OR REPLACE VIEW postfix_gid AS
SELECT gid, domainname
FROM domain_name;
CREATE OR REPLACE VIEW vmm_domain_info AS
SELECT gid, count(uid) AS accounts,
(SELECT count(DISTINCT address)
FROM alias
WHERE alias.gid = domain_data.gid) AS aliases,
(SELECT count(gid)
FROM relocated
WHERE relocated.gid = domain_data.gid) AS relocated,
(SELECT count(gid)
FROM domain_name
WHERE domain_name.gid = domain_data.gid
AND NOT domain_name.is_primary) AS aliasdomains,
(SELECT count(gid)
FROM catchall
WHERE catchall.gid = domain_data.gid) AS catchall
FROM domain_data
LEFT JOIN domain_name USING (gid)
LEFT JOIN users USING (gid)
WHERE domain_name.is_primary
GROUP BY gid;
-- ########################################################################## --
CREATE LANGUAGE plpgsql;
-- ######################## TYPEs ########################################### --
-- ---
-- Data type for function postfix_virtual_mailbox(varchar, varchar)
-- ---
CREATE TYPE address_maildir AS (
address varchar(320),
maildir text
);
-- ---
-- Data type for function dovecotpassword(varchar, varchar)
-- ---
CREATE TYPE dovecotpassword AS (
userid varchar(320),
password varchar(270),
smtp boolean,
pop3 boolean,
imap boolean,
sieve boolean
);
-- ---
-- Data type for function dovecotquotauser(varchar, varchar)
-- ---
CREATE TYPE dovecotquotauser AS (
userid varchar(320),
uid bigint,
gid bigint,
home text,
mail text,
quota_rule text
);
-- ---
-- Data type for function dovecotuser(varchar, varchar)
-- ---
CREATE TYPE dovecotuser AS (
userid varchar(320),
uid bigint,
gid bigint,
home text,
mail text
);
-- ---
-- Data type for functions: postfix_relocated_map(varchar, varchar)
-- postfix_virtual_alias_map(varchar, varchar)
-- ---
CREATE TYPE recipient_destination AS (
recipient varchar(320),
destination text
);
-- ---
-- Data type for function postfix_transport_map(varchar, varchar)
-- ---
CREATE TYPE recipient_transport AS (
recipient varchar(320),
transport text
);
-- ---
-- Data type for function postfix_virtual_uid_map(varchar, varchar)
-- ---
CREATE TYPE recipient_uid AS (
recipient varchar(320),
uid bigint
);
-- ---
-- Data type for function postfix_smtpd_sender_login_map(varchar, varchar)
-- ---
CREATE TYPE sender_login AS (
sender varchar(320),
login text
);
-- ######################## TRIGGERs ######################################## --
CREATE OR REPLACE FUNCTION domain_primary_trigger() RETURNS TRIGGER AS $$
DECLARE
primary_count bigint;
BEGIN
SELECT INTO primary_count count(gid) + NEW.is_primary::integer
FROM domain_name
WHERE domain_name.gid = NEW.gid
AND is_primary;
IF (primary_count > 1) THEN
RAISE EXCEPTION 'There can only be one domain marked as primary.';
END IF;
RETURN NEW;
END;
$$ LANGUAGE plpgsql STABLE;
CREATE TRIGGER primary_count_ins BEFORE INSERT ON domain_name
FOR EACH ROW EXECUTE PROCEDURE domain_primary_trigger();
CREATE TRIGGER primary_count_upd AFTER UPDATE ON domain_name
FOR EACH ROW EXECUTE PROCEDURE domain_primary_trigger();
CREATE OR REPLACE FUNCTION merge_userquota() RETURNS TRIGGER AS $$
BEGIN
IF NEW.messages < 0 OR NEW.messages IS NULL THEN
IF NEW.messages IS NULL THEN
NEW.messages = 0;
ELSE
NEW.messages = -NEW.messages;
END IF;
RETURN NEW;
END IF;
LOOP
UPDATE userquota
SET bytes = bytes + NEW.bytes, messages = messages + NEW.messages
WHERE uid = NEW.uid;
IF found THEN
RETURN NULL;
END IF;
BEGIN
IF NEW.messages = 0 THEN
INSERT INTO userquota VALUES (NEW.uid, NEW.bytes, NULL);
ELSE
INSERT INTO userquota VALUES (NEW.uid, NEW.bytes, -NEW.messages);
END IF;
RETURN NULL;
EXCEPTION
WHEN unique_violation THEN
-- do nothing, and loop to try the UPDATE again
WHEN foreign_key_violation THEN
-- break the loop: a non matching uid means no such user
RETURN NULL;
END;
END LOOP;
END;
$$ LANGUAGE plpgsql;
CREATE TRIGGER mergeuserquota BEFORE INSERT ON userquota
FOR EACH ROW EXECUTE PROCEDURE merge_userquota();
-- ######################## FUNCTIONs ####################################### --
-- ---
-- Parameters (from login name [localpart@the_domain]):
-- varchar localpart
-- varchar the_domain
-- Returns: dovecotpassword records
--
-- Required access privileges for your dovecot database user:
-- GRANT SELECT ON users, domain_name, service_set TO dovecot;
--
-- For more details see http://wiki.dovecot.org/AuthDatabase/SQL
-- ---
CREATE OR REPLACE FUNCTION dovecotpassword(
IN localpart varchar, IN the_domain varchar) RETURNS SETOF dovecotpassword
AS $$
DECLARE
record dovecotpassword;
userid varchar(320) := localpart || '@' || the_domain;
BEGIN
FOR record IN
SELECT userid, passwd, smtp, pop3, imap, sieve
FROM users, service_set, domain_data
WHERE users.gid = (SELECT gid
FROM domain_name
WHERE domainname = the_domain)
AND local_part = localpart
AND users.gid = domain_data.gid
AND CASE WHEN
users.ssid IS NOT NULL
THEN
service_set.ssid = users.ssid
ELSE
service_set.ssid = domain_data.ssid
END
LOOP
RETURN NEXT record;
END LOOP;
RETURN;
END;
$$ LANGUAGE plpgsql STABLE
RETURNS NULL ON NULL INPUT
EXTERNAL SECURITY INVOKER;
-- ---
-- Nearly the same as function dovecotuser below. It returns additionally the
-- field quota_rule.
--
-- Required access privileges for your dovecot database user:
-- GRANT SELECT
-- ON users, domain_data, domain_name, maillocation, mailboxformat,
-- quotalimit
-- TO dovecot;
-- ---
CREATE OR REPLACE FUNCTION dovecotquotauser(
IN localpart varchar, IN the_domain varchar) RETURNS SETOF dovecotquotauser
AS $$
DECLARE
record dovecotquotauser;
userid varchar(320) := localpart || '@' || the_domain;
did bigint := (SELECT gid FROM domain_name WHERE domainname=the_domain);
BEGIN
FOR record IN
SELECT userid, uid, did, domaindir || '/' || uid AS home,
format || ':~/' || directory AS mail, '*:bytes=' ||
bytes || ':messages=' || messages AS quota_rule
FROM users, domain_data, mailboxformat, maillocation, quotalimit
WHERE users.gid = did
AND users.local_part = localpart
AND maillocation.mid = users.mid
AND mailboxformat.fid = maillocation.fid
AND domain_data.gid = did
AND CASE WHEN
users.qid IS NOT NULL
THEN
quotalimit.qid = users.qid
ELSE
quotalimit.qid = domain_data.qid
END
LOOP
RETURN NEXT record;
END LOOP;
RETURN;
END;
$$ LANGUAGE plpgsql STABLE
RETURNS NULL ON NULL INPUT
EXTERNAL SECURITY INVOKER;
-- ---
-- Parameters (from login name [localpart@the_domain]):
-- varchar localpart
-- varchar the_domain
-- Returns: dovecotuser records
--
-- Required access privileges for your dovecot database user:
-- GRANT SELECT
-- ON users, domain_data, domain_name, maillocation, mailboxformat
-- TO dovecot;
--
-- For more details see http://wiki.dovecot.org/UserDatabase
-- ---
CREATE OR REPLACE FUNCTION dovecotuser(
IN localpart varchar, IN the_domain varchar) RETURNS SETOF dovecotuser
AS $$
DECLARE
record dovecotuser;
userid varchar(320) := localpart || '@' || the_domain;
did bigint := (SELECT gid FROM domain_name WHERE domainname=the_domain);
BEGIN
FOR record IN
SELECT userid, uid, did, domaindir || '/' || uid AS home,
format || ':~/' || directory AS mail
FROM users, domain_data, mailboxformat, maillocation
WHERE users.gid = did
AND users.local_part = localpart
AND maillocation.mid = users.mid
AND mailboxformat.fid = maillocation.fid
AND domain_data.gid = did
LOOP
RETURN NEXT record;
END LOOP;
RETURN;
END;
$$ LANGUAGE plpgsql STABLE
RETURNS NULL ON NULL INPUT
EXTERNAL SECURITY INVOKER;
-- ---
-- Parameters (from recipients address (MAIL TO) [localpart@the_domain]):
-- varchar localpart
-- varchar the_domain
-- Returns: recipient_destination records
--
-- Required access privileges for your postfix database user:
-- GRANT SELECT ON domain_name, relocated TO postfix;
--
-- For more details see postconf(5) section relocated_maps and relocated(5)
-- ---
CREATE OR REPLACE FUNCTION postfix_relocated_map(
IN localpart varchar, IN the_domain varchar)
RETURNS SETOF recipient_destination
AS $$
DECLARE
record recipient_destination;
recipient varchar(320) := localpart || '@' || the_domain;
did bigint := (SELECT gid FROM domain_name WHERE domainname=the_domain);
BEGIN
FOR record IN
SELECT recipient, destination
FROM relocated
WHERE gid = did
AND address = localpart
LOOP
RETURN NEXT record;
END LOOP;
RETURN;
END;
$$ LANGUAGE plpgsql STABLE
RETURNS NULL ON NULL INPUT
EXTERNAL SECURITY INVOKER;
-- ---
-- Parameters (from _sender_ address (MAIL FROM) [localpart@the_domain]):
-- varchar localpart
-- varchar the_domain
-- Returns: SASL _login_ names that own _sender_ addresses (MAIL FROM):
-- set of sender_login records.
--
-- Required access privileges for your postfix database user:
-- GRANT SELECT ON domain_name, users, alias TO postfix;
--
-- For more details see postconf(5) section smtpd_sender_login_maps
-- ---
CREATE OR REPLACE FUNCTION postfix_smtpd_sender_login_map(
IN localpart varchar, IN the_domain varchar) RETURNS SETOF sender_login
AS $$
DECLARE
rec sender_login;
did bigint := (SELECT gid FROM domain_name WHERE domainname=the_domain);
sender varchar(320) := localpart || '@' || the_domain;
BEGIN
-- Get all addresses for 'localpart' in the primary and aliased domains
FOR rec IN
SELECT sender, local_part || '@' || domainname
FROM domain_name, users
WHERE domain_name.gid = did
AND users.gid = did
AND users.local_part = localpart
LOOP
RETURN NEXT rec;
END LOOP;
IF NOT FOUND THEN
-- Loop over the alias addresses for localpart@the_domain
FOR rec IN
SELECT DISTINCT sender, destination
FROM alias
WHERE alias.gid = did
AND alias.address = localpart
LOOP
RETURN NEXT rec;
END LOOP;
END IF;
RETURN;
END;
$$ LANGUAGE plpgsql STABLE
RETURNS NULL ON NULL INPUT
EXTERNAL SECURITY INVOKER;
-- ---
-- Parameters (from recipients address (MAIL TO) [localpart@the_domain]):
-- varchar localpart
-- varchar the_domain
-- Returns: recipient_transport records
--
-- Required access privileges for your postfix database user:
-- GRANT SELECT ON users, transport, domain_name TO postfix;
--
-- For more details see postconf(5) section transport_maps and transport(5)
-- ---
CREATE OR REPLACE FUNCTION postfix_transport_map(
IN localpart varchar, IN the_domain varchar)
RETURNS SETOF recipient_transport
AS $$
DECLARE
record recipient_transport;
recipient varchar(320) := localpart || '@' || the_domain;
did bigint := (SELECT gid FROM domain_name WHERE domainname = the_domain);
transport_id bigint;
BEGIN
IF did IS NULL THEN
RETURN;
END IF;
SELECT tid INTO transport_id
FROM users
WHERE gid = did AND local_part = localpart;
IF transport_id IS NULL THEN
SELECT tid INTO STRICT transport_id
FROM domain_data
WHERE gid = did;
END IF;
FOR record IN
SELECT recipient, transport
FROM transport
WHERE tid = transport_id
LOOP
RETURN NEXT record;
END LOOP;
RETURN;
END;
$$ LANGUAGE plpgsql STABLE
RETURNS NULL ON NULL INPUT
EXTERNAL SECURITY INVOKER;
-- ---
-- Parameters (from recipients address (MAIL TO) [localpart@the_domain]):
-- varchar localpart
-- varchar the_domain
-- Returns: recipient_destination records
--
-- Required access privileges for your postfix database user:
-- GRANT SELECT ON alias, domain_name TO postfix;
--
-- For more details see postconf(5) section virtual_alias_maps and virtual(5)
-- ---
CREATE OR REPLACE FUNCTION _interpolate_destination(
IN destination varchar, localpart varchar, IN the_domain varchar)
RETURNS varchar
AS $$
DECLARE
result varchar(320);
BEGIN
IF position('%' in destination) = 0 THEN
RETURN destination;
END IF;
result := replace(destination, '%n', localpart);
result := replace(result, '%d', the_domain);
result := replace(result, '%=', localpart || '=' || the_domain);
RETURN result;
END;
$$ LANGUAGE plpgsql STABLE
RETURNS NULL ON NULL INPUT
EXTERNAL SECURITY INVOKER;
CREATE OR REPLACE FUNCTION postfix_virtual_alias_map(
IN localpart varchar, IN the_domain varchar)
RETURNS SETOF recipient_destination
AS $$
DECLARE
recordc recipient_destination;
record recipient_destination;
catchall_cursor refcursor;
recipient varchar(320) := localpart || '@' || the_domain;
did bigint := (SELECT gid FROM domain_name WHERE domainname=the_domain);
BEGIN
FOR record IN
SELECT recipient,
_interpolate_destination(destination, localpart, the_domain)
FROM alias
WHERE gid = did
AND address = localpart
LOOP
RETURN NEXT record;
END LOOP;
IF NOT FOUND THEN
-- There is no matching virtual_alias. If there are no catchall
-- records for this domain, we can just return NULL since Postfix
-- will then later consult mailboxes/relocated itself. But if
-- there is a catchall destination, then it would take precedence
-- over mailboxes/relocated, which is not what we want. Therefore,
-- we must first find out if the query is for an existing mailbox
-- or relocated entry and return the identity mapping if that is
-- the case
OPEN catchall_cursor FOR
SELECT recipient,
_interpolate_destination(destination, localpart, the_domain)
FROM catchall
WHERE gid = did;
FETCH NEXT FROM catchall_cursor INTO recordc;
IF recordc IS NOT NULL THEN
-- Since there are catchall records for this domain
-- check the mailbox and relocated records and return identity
-- if a matching record exists.
FOR record IN
SELECT recipient, recipient as destination
FROM users
WHERE gid = did
AND local_part = localpart
UNION SELECT recipient, recipient as destination
FROM relocated
WHERE gid = did
AND address = localpart
LOOP
RETURN NEXT record;
END LOOP;
IF NOT FOUND THEN
-- There were no records found for mailboxes/relocated,
-- so now we can actually iterate the cursor and populate
-- the return set
LOOP
RETURN NEXT recordc;
FETCH NEXT FROM catchall_cursor INTO recordc;
EXIT WHEN recordc IS NULL;
END LOOP;
END IF;
END IF;
CLOSE catchall_cursor;
END IF;
RETURN;
END;
$$ LANGUAGE plpgsql STABLE
RETURNS NULL ON NULL INPUT
EXTERNAL SECURITY INVOKER;
-- ---
-- Parameters (from recipients address (MAIL TO) [localpart@the_domain]):
-- varchar localpart
-- varchar the_domain
-- Returns: address_maildir records
--
-- Required access privileges for your postfix database user:
-- GRANT SELECT ON domain_data,domain_name,maillocation,users TO postfix;
--
-- For more details see postconf(5) section virtual_mailbox_maps
-- ---
CREATE OR REPLACE FUNCTION postfix_virtual_mailbox_map(
IN localpart varchar, IN the_domain varchar) RETURNS SETOF address_maildir
AS $$
DECLARE
rec address_maildir;
did bigint := (SELECT gid FROM domain_name WHERE domainname=the_domain);
address varchar(320) := localpart || '@' || the_domain;
BEGIN
FOR rec IN
SELECT address, domaindir||'/'||users.uid||'/'||directory||'/'
FROM domain_data, users, maillocation
WHERE domain_data.gid = did
AND users.gid = did
AND users.local_part = localpart
AND maillocation.mid = users.mid
LOOP
RETURN NEXT rec;
END LOOP;
RETURN;
END;
$$ LANGUAGE plpgsql STABLE
RETURNS NULL ON NULL INPUT
EXTERNAL SECURITY INVOKER;
-- ---
-- Parameters (from recipients address (MAIL TO) [localpart@the_domain]):
-- varchar localpart
-- varchar the_domain
-- Returns: recipient_uid records
--
-- Required access privileges for your postfix database user:
-- GRANT SELECT ON users, domain_name TO postfix;
--
-- For more details see postconf(5) section virtual_uid_maps
-- ---
CREATE OR REPLACE FUNCTION postfix_virtual_uid_map(
IN localpart varchar, IN the_domain varchar) RETURNS SETOF recipient_uid
AS $$
DECLARE
record recipient_uid;
recipient varchar(320) := localpart || '@' || the_domain;
BEGIN
FOR record IN
SELECT recipient, uid
FROM users
WHERE gid = (SELECT gid
FROM domain_name
WHERE domainname = the_domain)
AND local_part = localpart
LOOP
RETURN NEXT record;
END LOOP;
RETURN;
END;
$$ LANGUAGE plpgsql STABLE
RETURNS NULL ON NULL INPUT
EXTERNAL SECURITY INVOKER;