SharePoint Rest API In Javascript

https://docs.microsoft.com/en-us/previous-versions/office/sharepoint-csom/jj167799(v=office.15)?redirectedfrom=MSDN

I have the code your created in the above. Very nice. I work for one of your customers Wells Fargo. The Sp Requirements I received seems to be feel its important to change The FROM  SP email that's sent out to SP Users.  Normally this uses whatever central admin enter as the server addres and inlcude do not reply in the FROM.

Requirements:

1. Step1 -Desire SP EmailsFrom  to =  TREX Reporting @WellsFargo.com .............minus the do not reply.
2. Step2 The Recipients or To of the email needs filter a list and fetch created by email user names if status= yes. If yes then extract the createdby email names and insert them into the To Variable
3. In theBody: We already have some html code in a file called  filename.html

Question

How to Change the code in the above link accommodate 1,2,3

Email Contact: xxx@xxx,com 

Joe Mezzo