As I said it's possible workarounds for now, it doesn't need to be permanent, if it gets a change in core.
Issues and bugs in core can be posted at GitHub: https://github.com/arastta/arastta/issues

Hi Rune,

thanks for the advice, but I like to keep the link for registered users to keep it easy to them. The issue comes from the script {order_href} because the HTML source looks OK.

    <p style="margin-top: 0px; margin-bottom: 20px;">        To view your order click on the link below:    </p>





    <p style="margin-top: 0px; margin-bottom: 20px;">        <a href="/{order_href}" target="_blank">{order_href}</a>    </p>

Take a look how it comes out for a registered user:

To view your order click on the link below: 

https://netmart.club/index.php?route=account/order/info&order_id=673425" target="_blank">https://netmart.club/index.php?route=account/order/info&order_id=673425

It would be OK to change the text to:
If you registered an account you can click the link bellow to view your order:

It might should be taken a look at the source which might mess up the HTML source.

Kind regards

Hermann

Right. As a workaround you can edit the mail template, either to remove it for all, or change the text to t.ex. «If you registered an account you can click the link bellow to view your order:»