diff --git a/migrations/20180211052642-mailboxes-alter-domains-constraint.js b/migrations/20180211052642-mailboxes-alter-domains-constraint.js
new file mode 100644
index 000000000..63740bcb3
--- /dev/null
+++ b/migrations/20180211052642-mailboxes-alter-domains-constraint.js
@@ -0,0 +1,19 @@
+'use strict';
+
+var async = require('async');
+
+exports.up = function(db, callback) {
+    async.series([
+        db.runSql.bind(db, 'START TRANSACTION;'),
+        db.runSql.bind(db, 'ALTER TABLE mailboxes DROP FOREIGN KEY mailboxes_domain_constraint'),
+        db.runSql.bind(db, 'ALTER TABLE mailboxes ADD CONSTRAINT mailboxes_domain_constraint FOREIGN KEY(domain) REFERENCES mail(domain)'),
+        db.runSql.bind(db, 'COMMIT')
+    ], callback);
+};
+
+exports.down = function(db, callback) {
+    db.runSql('ALTER TABLE mailboxes DROP FOREIGN KEY mailboxes_domain_constraint', function (error) {
+        if (error) console.error(error);
+        callback(error);
+    });
+};
diff --git a/migrations/schema.sql b/migrations/schema.sql
index 9ac57a539..c74e6aa3a 100644
--- a/migrations/schema.sql
+++ b/migrations/schema.sql
@@ -133,21 +133,6 @@ CREATE TABLE IF NOT EXISTS eventlog(
 
     PRIMARY KEY (id));
 
-/* Future fields:
-   * accessRestriction - to determine who can access it. So this has foreign keys
-   * quota - per mailbox quota
-*/
-CREATE TABLE IF NOT EXISTS mailboxes(
-    name VARCHAR(128) NOT NULL,
-    ownerId VARCHAR(128) NOT NULL, /* app id or user id or group id */
-    ownerType VARCHAR(16) NOT NULL, /* 'app' or 'user' or 'group' */
-    aliasTarget VARCHAR(128), /* the target name type is an alias */
-    creationTime TIMESTAMP,
-    domain VARCHAR(128),
-
-    FOREIGN KEY(domain) REFERENCES domains(domain),
-    UNIQUE (name, domain));
-
 CREATE TABLE IF NOT EXISTS domains(
     domain VARCHAR(128) NOT NULL UNIQUE, /* if this needs to be larger, InnoDB has a limit of 767 bytes for PRIMARY KEY values! */
     zoneName VARCHAR(128) NOT NULL, /* this mostly contains the domain itself again */
@@ -173,4 +158,18 @@ CREATE TABLE IF NOT EXISTS mail(
 
     CHARACTER SET utf8 COLLATE utf8_bin;
 
+/* Future fields:
+   * accessRestriction - to determine who can access it. So this has foreign keys
+   * quota - per mailbox quota
+*/
+CREATE TABLE IF NOT EXISTS mailboxes(
+    name VARCHAR(128) NOT NULL,
+    ownerId VARCHAR(128) NOT NULL, /* app id or user id or group id */
+    ownerType VARCHAR(16) NOT NULL, /* 'app' or 'user' or 'group' */
+    aliasTarget VARCHAR(128), /* the target name type is an alias */
+    creationTime TIMESTAMP,
+    domain VARCHAR(128),
+
+    FOREIGN KEY(domain) REFERENCES mail(domain),
+    UNIQUE (name, domain));