Open In Webmail
Don’t want Mail.app to open when you click an email or mailto: link? I wrote a small app for that.
It’s a simple app — it registers itself with macOS as a handler for
mailto: links. Whenever you click an email link, Open In Webmail receives the
mailto: URL and opens your webmail service of choice. Gmail, Yahoo, Outlook, Fastmail, Zoho, and AOL work out of the box.
Because it’s an app and not a browser extension or plugin, it works system-wide for Safari, Chrome, Firefox or any other apps that might open email links.
Hope it’s helpful to some!