nano /etc/postfix/mysql-virtual_domains.cf
hosts = localhost
user = postfix
password = postfix001
dbname = postfix
table = domains
select_field = 'virtual'
where_field = domain

nano /etc/postfix/mysql-virtual_forwardings.cf
hosts = localhost
user = postfix
password = postfix001
dbname = postfix
table = forwardings
select_field = destination
where_field = email

nano /etc/postfix/mysql-virtual_mailboxes.cf
hosts = localhost
user = postfix
password = postfix001
dbname = postfix
table = users
select_field = CONCAT(SUBSTRING_INDEX(email,'@',-1),'/',SUBSTRING_INDEX(email,'@',1),'/')
where_field = email

nano /etc/postfix/mysql-virtual_email2email.cf
hosts = localhost
user = postfix
password = postfix001
dbname = postfix
table = users
select_field = email
where_field = email

nano /etc/postfix/mysql-virtual_transports.cf
hosts = localhost
user = postfix
password = postfix001
dbname = postfix
table = transport
select_field = transport
where_field = domain

nano /etc/postfix/mysql-virtual_mailbox_limit_maps.cf
hosts = localhost
user = postfix
password = postfix001
dbname = postfix
table = users
select_field = quota
where_field = email