fing086 Hi Daz,
The forum thread that you linked is located at JA Extension sub-forum, therefore your account does not have access to view it. I've checked that thread and it's about "The module works fine on my desktop, but does not send an email on my phone (google pixel 2)" . Is it the same issue that you have or it's not related at all?
If you are dealing with a different issue then please help to open your own forum topic to receive our support. Simply click START A DISCUSSION button and add the tags of the template you're using.