URL, but no hyperlink

I am trying out Post Notification by Email on a self hosted blog that is not yet accessible from the Internet. It works, but the notifications contain the URL of the new post in text, not as hyperlink (no <a href etc). Outlook and iPad mail still detect it as such and display it as a hyperlink, but the mail app in Windows 8.1 and the E-mail app in Android 4.0.4 do not. Is there a setting that I missed?

Edit: found a workaround. Go to the Text tab in the editor, not Visual. Replace {link_post} by:
<a href="{link_post}">{link_post}</a>
But it would be better if the plugin took care of that

https://ww.wp.xz.cn/plugins/notify-users-e-mail/