I have 5 domains at JustHost.com, which is also BlueHost.com. Our e-mails are being bounced by several domains, for example:
Reporting-MTA: dns; soproxy1.mail.unifiedlayer.com X-Postfix-Queue-ID: 25AD2175A72 X-Postfix-Sender: rfc822; email@example.com Arrival-Date: Thu, 24 Aug 2017 07:07:08 -0600 (MDT) Final-Recipient: rfc822; firstname.lastname@example.org Original-Recipient: rfc822;email@example.com Action: failed Status: 5.2.1 Remote-MTA: dns; mailin-04.mx.aol.com Diagnostic-Code: smtp; 521 5.2.1 : AOL will not accept delivery of this message.
It is a known issue, you will have to try after sometime. And if you want permanent solution for that you will have to purchase Gsuite. If you purchase G suite it will point to Google so your emails will work.
Duh, trying after some time is not an acceptable solution. And I can use Google myself without buying a product that should be included if the service does not work.
I am going to move all my domains to another ISP.