From: Mail Delivery System
[mailto:MAILER-DAEMON@qproxy1.mail.unifiedlayer.com]
Sent: Wednesday, August 30, 2017 9:41 PM
To: Jim@<Customers Domain>.com
Subject: Undelivered Mail Returned to Sender
This is the mail system at host qproxy1.mail.unifiedlayer.com.
I'm sorry to have to inform you that your message could not be delivered to one or more recipients. It's attached below.
For further assistance, please send mail to postmaster.
If you do so, please include this problem report. You can delete your own text from the attached returned message.
                   The mail system
<<Recipiants Email Address>@aol.com>: delivery temporarily suspended: host
    mailin-01.mx.aol.com[152.163.0.67] refused to talk to me: 421 4.7.1 :
    (DYN:T1) https://postmaster.aol.com/error-codes#421dynt1*

Reporting-MTA: dns; qproxy6.mail.unifiedlayer.com
X-Postfix-Queue-ID: 7BEAA140B7B
X-Postfix-Sender: rfc822; Jim@<Customers Domain>.com
Arrival-Date: Thu, 24 Aug 2017 10:05:30 -0600 (MDT)

Final-Recipient: rfc822; <Recipiants Email>@aol.com
Original-Recipient: rfc822;<Recipiants Email>@aol.com
Action: failed
Status: 5.2.1
Remote-MTA: dns; mailin-03.mx.aol.com
Diagnostic-Code: smtp; 521 5.2.1 :  AOL will not accept delivery of this
    message.

Reporting-MTA: dns; qproxy5.mail.unifiedlayer.com
X-Postfix-Queue-ID: 819436B44F
X-Postfix-Sender: rfc822; Jim@<Customers Domain>.com
Arrival-Date: Wed, 23 Aug 2017 10:47:33 +0000 (UTC)

Final-Recipient: rfc822; <Recipiants EMail>@verizon.net
Original-Recipient: rfc822;<Recipiants EMail>@verizon.net
Action: failed
Status: 4.7.1
Diagnostic-Code: X-Postfix; delivery temporarily suspended: host
    mailin-01.mx.aol.com[64.12.88.131] refused to talk to me: 421 4.7.1 :
    (DYN:T1) https://postmaster.aol.com/error-codes#421dynt1