IP address: 22.214.171.124
Host name: o503159119.outbound-mail.sendgrid.net
126.96.36.199 is from United States(US) in region North America
They appear to be a cloud based email host/gateway provider so they could be hosting email for anyone/domain/business.
In the past you have taken the IP off the the list are you able to do this for us?
For the record, they host that email address for profundcom.net
This is a community forum and I don't work for McAfee.
If your lucky sometimes a McAfee employee is on the forum to answering some questions but they probably won't be able to deal with your request in such a way.
Your best bet is to raise a ticket with McAfee support.