create maildb entry in database._clear

src/database.js

@@ -105,6 +105,7 @@ function clear(callback) {
         child_process.exec.bind(null, cmd),
         require('./clientdb.js')._addDefaultClients,
         require('./domaindb.js')._addDefaultDomain,
+        require('./maildb.js')._addDefaultDomain,
         require('./groupdb.js')._addDefaultGroups
     ], callback);
 }

src/mail.js

@@ -786,7 +786,7 @@ function setMailEnabled(domain, enabled, callback) {
 
         restartMail(NOOP_CALLBACK);
 
-        if (!enabled || process.env.BOX_ENV === 'test') return callback();
+        if (!enabled || process.env.BOX_ENV === 'test') return callback(null);
 
         // Add MX and DMARC record. Note that DMARC policy depends on DKIM signing and thus works
         // only if we use our internal mail server.

src/maildb.js

@@ -8,6 +8,7 @@ exports = module.exports = {
     update: update,
 
     _clear: clear,
+    _addDefaultDomain: addDefaultDomain,
 
     TYPE_USER: 'user',
     TYPE_APP: 'app',
@@ -15,6 +16,7 @@ exports = module.exports = {
 };
 
 var assert = require('assert'),
+    config = require('./config.js'),
     database = require('./database.js'),
     DatabaseError = require('./databaseerror.js'),
     safe = require('safetydance');
@@ -120,3 +122,12 @@ function update(domain, data, callback) {
         callback(null);
     });
 }
+
+function addDefaultDomain(callback) {
+    assert(config.fqdn(), 'no fqdn set in config, cannot continue');
+
+    add(config.fqdn(), function (error) {
+        if (error && error.reason !== DatabaseError.ALREADY_EXISTS) return callback(error);
+        callback();
+    });
+}