How can I implement e-mail addresses in a Trigger.io app to (externally) open the Mail application for sending an e-mail?
The basic attribute seems not work out of the box and I didn't find anything in the official Trigger.io docs.
Just using plain HTML works fine for my Trigger.io app:
<a href="mailto:your-email@address.com">Contact me</a>
You can even add a predefined subject, just add ?subject=email-subject at the end of the href attribute. Check out the mailto syntax for more examples.