In wordpress contact form, I have changed into file limit 25MB on setting and I have changed the allowed_size into 25MB on file.php under module. But I still can't send attachment from contact form to email box if file size is larger than 5MB. The file is uploaded into server and can't send into mail. May I know the solution?
If more than 5MB, the script error is shown below : TypeError: xhr.responseJSON is null