Steps to reproduce the issue

1. Fill all SMTP fields in Mail Settings for a server that requires authentication
2. But, don't enable SMTP Authentication

Expected result

Mails are not sent via SMTP that requires authentication. Because, SMTP Authentication is not enabled.

Actual result

Mails are sent via SMTP, even when SMTP Authentication is disabled.

System information (as much as possible)

Any browser

Additional comments

The radio buton is simply queried but jQuery does not take into account that it is a radio button.

Fix: sendtestmail-uncompressed.js

jQuery(document).ready(function ($)
{
$('#sendtestmail').click(function ()
{
var email_data = {
smtpauth : $('input[name="jform[smtpauth]"]:checked').val(),
smtpuser : $('input[name="jform[smtpuser]"]').val(),
smtppass : $('input[name="jform[smtppass]"]').val(),
smtphost : $('input[name="jform[smtphost]"]').val(),
smtpsecure: $('select[name="jform[smtpsecure]"]').val(),
smtpport : $('input[name="jform[smtpport]"]').val(),
mailfrom : $('input[name="jform[mailfrom]"]').val(),
fromname : $('input[name="jform[fromname]"]').val(),
mailer : $('select[name="jform[mailer]"]').val(),
mailonline: $('input[name="jform[mailonline]"]:checked').val()
};