I am using the below code but I still get the outgoing “From email” which is mentioned outgoing email settings in CA.

<script type="text/javascript">   function processSendEmails() {      var from = 'abc@testing.com',         to = 'xyz@testing',         body = 'Hello World Body',         subject = 'Hello World Subject';      // Call sendEmail function     //     sendEmail(from, to, body, subject); }   function sendEmail(from, to, body, subject) {     //Get the relative url of the site     var siteurl = _spPageContextInfo.webServerRelativeUrl;     var urlTemplate = siteurl + "/_api/SP.Utilities.Utility.SendEmail";     $  .ajax({         contentType: 'application/json',         url: urlTemplate,         type: "POST",         data: JSON.stringify({             'properties': {                 '__metadata': {                     'type': 'SP.Utilities.EmailProperties'                 },                 'From': 'globalPSIAppProducts@deloitte.com',                 'To': {                     'results': [to]                 },                 'Body': body,                 'Subject': subject             }         }),         headers: {             "Accept": "application/json;odata=verbose",             "content-type": "application/json;odata=verbose",             "X-RequestDigest": jQuery("#__REQUESTDIGEST").val()         },         success: function(data) {             alert('Email Sent Successfully');         },         error: function(err) {             alert('Error in sending Email: ' + JSON.stringify(err));         }     }); }  /* $  (document).ready(function () {      SP.SOD.executeFunc('sp.js', 'SP.ClientContext', processSendEmails);  }); */ </script>   }  { <form id="form1" runat="server">   <SharePoint:FormDigest ID="FormDigest1" runat="server"></SharePoint:FormDigest>  <input name="Submit1" type="submit" value="submit" onclick="processSendEmails()" />  </form>  }