SP.Utilities.Utility.SendEmail Change “From” display text

Question

When sending emails via SP.Utilities.Utility.SendEmail, is it possible to change the From's display name so that it says something different rather than a title of the current site?

I'm fully aware of the fact that the from's email will always be no-reply@sharepointonline.com, but can I change the display name of it, at least?

Here is the code I'm using:

var subject = "SUBJECT OF THE MAIL";
var mailContent = "<h3>Some Heading for the mail</h3><p>Content</p><div>Content</div>";
var toList = ["usser5@contoso.onmicrosoft.com"]

//Send email message over REST
function sendMail(toList, subject, mailContent) {
    var restUrl = _spPageContextInfo.webAbsoluteUrl + "/_api/SP.Utilities.Utility.SendEmail",
    restHeaders = {
        "Accept": "application/json;odata=verbose",
        "X-RequestDigest": $("#__REQUESTDIGEST").val(),
        "Content-Type": "application/json;odata=verbose"
    },
    mailObject = {
        'properties': {
            '__metadata': {
                'type': 'SP.Utilities.EmailProperties'
            },
            'To': {
                'results': toList
            },
            //'From': 'user@contoso.onmicrosoft.com"',
            'FromDisplay': 'Display From"', // <--- I want a property like this one
            // Important Note: this property does not work in SharePoint Online.
            // the <from> field will always be "no-reply@sharepointonline.com"
            'Subject': subject,
            'Body': mailContent,
            "AdditionalHeaders":
                {
                    "__metadata":
                    { "type": "Collection(SP.KeyValue)" },
                    "results":
                    [
                        {
                            "__metadata": {
                                "type": 'SP.KeyValue'
                            },
                            "Key": "content-type",
                            "Value": 'text/html',
                            "ValueType": "Edm.String"
                        }
                    ]
                }
        }
    };
    return $.ajax({
        contentType: "application/json",
        url: restUrl,
        type: "POST",
        data: JSON.stringify(mailObject),
        headers: restHeaders
    });

} 

$(function(){
 sendMail(toList, subject, mailContent).then(function(data){console.log(data.d)})
})    

Answer 1

i am currently working on a similar problem and you can do it like this if you want to display a SharePoint user:

"properties" : {
    "__metadata": {
        "type": "SP.Utilities.EmailProperties"
    },
    "From": "username@domain", // <-- this one must be a SharePoint user 
    "Subject": "TestMail",
    "To": {
        "results": to
    },
    "Body": "Hallo Welt"
}

the result in outlook is the display name of the SharePoint User and <no-replay@sharepointonline.com> like the image below

And in an answer the to field will be the user.

Answer 2

I'm concluding that in SharePoint Online it is impossible to use SP.Utilities.Utility.SendEmail method and specify the from field. From field will always be no-reply@sharepointonline.com and the Description will match the Title of the web site you are calling this method from.

Answer 3

Thank to this answer, I found a way to change the From and the Reply also. I tested it with Sharepoint 2013 On-Promise:

{
  'properties': {
    '__metadata': {
      'type': 'SP.Utilities.EmailProperties'
    }
    'AdditionalHeaders': {
      "__metadata": {
        "type":"Collection(SP.KeyValue)"
      },
      "results": [
        {
          "__metadata": {
            "type": 'SP.KeyValue'
          },
          "Key": "From:",
          "Value": 'My Title <some.email@example.com>', // here you can change the From
          "ValueType": "Edm.String"
        },
        {
          "__metadata": {
            "type": 'SP.KeyValue'
          },
          "Key": "Reply-To:",
          "Value": 'email@example.com', // when the user will hit the Reply button, this email will be used
          "ValueType": "Edm.String"
        }
      ]
    },
    'To': {
      'results': [username]
    },
    'Body': body,
    'Subject': subject
  }
}