sendmail: allow display name to be set

src/mail.js

@@ -22,6 +22,7 @@ exports = module.exports = {
     setDnsRecords,
 
     validateName,
+    validateDisplayName,
 
     setMailFromValidation,
     setCatchAllAddress,
@@ -65,7 +66,6 @@ exports = module.exports = {
     TYPE_LIST: 'list',
     TYPE_ALIAS: 'alias',
 
-    _validateName: validateName,
     _delByDomain: delByDomain,
     _updateDomain: updateDomain
 };
@@ -169,6 +169,15 @@ function validateName(name) {
     return null;
 }
 
+function validateDisplayName(name) {
+    assert.strictEqual(typeof name, 'string');
+
+    if (name.length < 1) return new BoxError(BoxError.BAD_FIELD, 'mailbox display name must be atleast 1 char');
+    if (name.length >= 100) return new BoxError(BoxError.BAD_FIELD, 'mailbox name too long');
+
+    return null;
+}
+
 async function checkOutboundPort25() {
     const relay = {
         value: 'OK',