User-534300708 posted
Message delivery to the host '<IP address>' failed while delivering to the remote domain 'xyz.com' for the following reason: An SMTP protocol error occurred.
Below is the message from eventvwr. Any guidance to resolve this please !!
<Provider Name="smtpsvc" />
<EventID Qualifiers="32772">4006</EventID>
<Level>3</Level>
<Task>0</Task>
<Keywords>0x80000000000000</Keywords>
<TimeCreated SystemTime="2017-05-22T11:42:28.000000000Z" />
<EventRecordID>144505</EventRecordID>
<Channel>System</Channel>
<Data>xyz.com</Data>
<Data>An SMTP protocol error occurred.
</Data>
<Binary>D70204C0</Binary>
</EventData>
</Event>