diff --git a/rootfs/etc/confd/conf.d/pgsql-virtual-mailbox-maps.cf.toml b/rootfs/etc/confd/conf.d/pgsql-virtual-mailbox-maps.cf.toml
new file mode 100644
index 0000000..19fb044
--- /dev/null
+++ b/rootfs/etc/confd/conf.d/pgsql-virtual-mailbox-maps.cf.toml
@@ -0,0 +1,3 @@
+[template]
+src = "pgsql-virtual-mailbox-maps.cf.tmpl"
+dest = "/etc/postfix/pgsql-virtual-mailbox-maps.cf"
diff --git a/rootfs/etc/confd/templates/main.cf.tmpl b/rootfs/etc/confd/templates/main.cf.tmpl
index 6cbc15a..336d1e8 100644
--- a/rootfs/etc/confd/templates/main.cf.tmpl
+++ b/rootfs/etc/confd/templates/main.cf.tmpl
@@ -17,6 +17,7 @@ mailbox_transport = lmtp:{{getenv "LMTP_HOST"}}
 mailbox_size_limit = {{getenv "MAILBOX_SIZELIMIT" "0"}}
 smtpd_banner = {{getenv "SMTP_BANNER"}} $myhostname ESMTP $mail_name
 
+virtual_mailbox_maps = pgsql:/etc/postfix/pgsql-virtual-mailbox-maps.cf
 virtual_mailbox_domains = pgsql:/etc/postfix/pgsql-virtual-mailbox-domains.cf
 virtual_alias_maps = pgsql:/etc/postfix/pgsql-virtual-alias-maps.cf
 virtual_transport = lmtp:inet:{{getenv "LMTP_HOST"}}:{{getenv "LMTP_PORT"}}
diff --git a/rootfs/etc/confd/templates/pgsql-virtual-mailbox-maps.cf.tmpl b/rootfs/etc/confd/templates/pgsql-virtual-mailbox-maps.cf.tmpl
new file mode 100644
index 0000000..ad86a75
--- /dev/null
+++ b/rootfs/etc/confd/templates/pgsql-virtual-mailbox-maps.cf.tmpl
@@ -0,0 +1,5 @@
+hosts = {{ getenv "DB_HOST" }}
+user = {{ getenv "DB_USER" "email" }}
+password = {{ getenv "DB_PASSWORD" }}
+dbname = {{ getenv "DB_NAME" "email" }}
+query = SELECT 1 FROM virtual_users WHERE email ='%s'