Good work, i was able to reproduce the same issue you are having when you enter all capital email address.
To fix this issue:
open the MailFormatting_PHP.php file which is located in your WA_Universal_Email folder and look for this line of code:
if ($testAddress != "") {
and right above it place this line of code:
$testAddress = strtolower($testAddress);
So you should have:
$testAddress = strtolower($testAddress);
if ($testAddress != "") {


