diff --git a/src/apps.js b/src/apps.js
index b0920d28c..14cb218b5 100644
--- a/src/apps.js
+++ b/src/apps.js
@@ -103,7 +103,7 @@ AppsError.BAD_CERTIFICATE = 'Invalid certificate';
 // https://en.wikipedia.org/wiki/Hostname#Restrictions_on_valid_host_names
 // We are validating the validity of the location-fqdn as host name
 function validateHostname(location, fqdn) {
-    var RESERVED_LOCATIONS = [ constants.ADMIN_LOCATION, constants.API_LOCATION, constants.SMTP_LOCATION, constants.IMAP_LOCATION, constants.MAIL_LOCATION ];
+    var RESERVED_LOCATIONS = [ constants.ADMIN_LOCATION, constants.API_LOCATION, constants.SMTP_LOCATION, constants.IMAP_LOCATION, constants.MAIL_LOCATION, constants.POSTMAN_LOCATION ];
 
     if (RESERVED_LOCATIONS.indexOf(location) !== -1) return new Error(location + ' is reserved');
 
diff --git a/src/constants.js b/src/constants.js
index 96a5f1a0c..0be32b4bf 100644
--- a/src/constants.js
+++ b/src/constants.js
@@ -7,6 +7,7 @@ exports = module.exports = {
     SMTP_LOCATION: 'smtp',
     IMAP_LOCATION: 'imap',
     MAIL_LOCATION: 'my', // not a typo! should be same as admin location until we figure out certificates
+    POSTMAN_LOCATION: 'postman', // used in dovecot bounces
 
     ADMIN_NAME: 'Settings',