WP HTML Mail has also a preview Feature in its Woocommerce extension that works fine for some premium add-ons on my website.
Maybe not for all but you could give it a try https://de.ww.wp.xz.cn/plugins/wp-html-mail/
After wasting a few hours customizing the templates (no chance to get them even work on mobile) I found this plugin http://etzelstorfer.com/en/downloads/wp-html-mail-woocommerce/ and it took me half an hour to finalize my store mails.
Hey Jannik, I was looking for this earlier today. I found a NinjaForms integration in the meantime and I’m really excited. NinjaForms seems to be 100 versions ahead of Contact Form 7, a really great tool.
