diff --git a/migrations/20160921205726-mailboxes-add-ownerId.js b/migrations/20160921205726-mailboxes-add-ownerId.js
new file mode 100644
index 000000000..427477aad
--- /dev/null
+++ b/migrations/20160921205726-mailboxes-add-ownerId.js
@@ -0,0 +1,65 @@
+'use strict';
+
+var dbm = dbm || require('db-migrate');
+
+exports.up = function(db, callback) {
+    async.series([
+        db.runSql.bind(db, 'ALTER TABLE mailboxes ADD COLUMN ownerId VARCHAR(128)'),
+        db.runSql.bind(db, 'ALTER TABLE mailboxes ADD COLUMN ownerType VARCHAR(16)'),
+        db.runSql.bind(db, 'START TRANSACTION;'),
+        function addGroupMailboxes(done) {
+            console.log('Importing group mailboxes');
+
+            db.all('SELECT id, name FROM groups', function (error, results) {
+                if (error) return done(error);
+
+                async.eachSeries(results, function (g, next) {
+                    db.runSql('INSERT INTO mailboxes (ownerId, ownerType, name) VALUES (?, ?, ?)', [ g.id, 'group', g.name ], next);
+                }, done);
+            });
+        },
+        function addAppMailboxes(done) {
+            console.log('Importing app mail boxes');
+
+            db.all('SELECT id, location, manifestJson FROM apps', function (error, results) {
+                if (error) return done(error);
+
+                async.eachSeries(results, function (a, next) {
+                    var manifest = JSON.parse(a.manifestJson);
+                    if (!manifest.addons['sendmail'] && !manifest.addons['recvmail']) return next();
+
+                    var mailboxName = (a.location ? a.location : manifest.title.replace(/[^a-zA-Z0-9]/g, '')) + '.app';
+                    db.runSql('INSERT INTO mailboxes (ownerId, ownerType, name) VALUES (?, ?, ?)', [ a.id, 'app', mailboxName ], next);
+                }, done);
+            });
+        },
+        function setUserMailboxOwnerIds(done) {
+            console.log('Setting owner id of user mailboxes and aliases');
+
+            db.all('SELECT id, username FROM users', function (error, results) {
+                if (error) return done(error);
+
+                async.eachSeries(results, function (u,  next) {
+                    if (!u.username) return next();
+
+                    db.runSql('UPDATE mailboxes SET ownerId = ?, ownerType = ? WHERE name = ? OR targetAlias = ?', [ u.id, 'user', u.username, u.username ], done);
+                }, done);
+            });
+        },
+        db.runSql.bind(db, 'COMMIT'),
+        db.runSql.bind(db, 'ALTER TABLE mailboxes MODIFY ownerId VARCHAR(128) NOT NULL'),
+        db.runSql.bind(db, 'ALTER TABLE mailboxes MODIFY ownerType VARCHAR(128) NOT NULL'),
+    ], callback);
+};
+
+exports.down = function(db, callback) {
+    db.runSql('ALTER TABLE mailboxes DROP COLUMN ownerId', function (error) {
+        if (error) console.error(error);
+
+        db.runSql('ALTER TABLE mailboxes DROP COLUMN ownerType', function (error) {
+            if (error) console.error(error);
+            callback(error);
+        });
+    });
+};
+
diff --git a/migrations/schema.sql b/migrations/schema.sql
index 693724450..686bc9e50 100644
--- a/migrations/schema.sql
+++ b/migrations/schema.sql
@@ -125,6 +125,8 @@ CREATE TABLE IF NOT EXISTS eventlog(
 */
 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,