What are possible status for a email in job status response from easylink ?
This document is available that shows Status and Mapping:
https://apiforums.easylink.com/content/report-status-mapping
There is a blog at:
https://apiforums.easylink.com/content/how-determine-delivery-status-email-and-sms-destinations
If you do a search for Status there are also a number of discussions on the subject.