Reject reason: Helo command rejected: ACCESS DENIED. Your email was rejected because the sending mail server does not identify itself correctly (.local);
Quote from forum:
It means your client's MTA uses a FQDN hostname which ends with '.local' as HELO identity.
'.local' is not a valid top domain name, and all mail servers should use a valid domain name. You have two solutions:
Personally, i suggest you try #1 first.