Yes, We can send email through HTML/JavaScript using SPUtility Send Email.
Pease find below sample code.
function processSendEmails() {

var from = ‘asad@Example.com’,
to = ‘someone@Example.com’,
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’: from,
‘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);

});