Is there an alternative technique than standard <form> for allowing email recipients to type in a text box and click a button to open a new URL with the text box contents in a query parameter?

Gmail / Inbox pop up warnings before form submission such as:

This form may not function properly due to certain security constraints.
Continue?

Is there any other way to capture a text input from email?

If not, is there a fallback method for Gmail/Inbox clients to hide the form?