Note that if you do this, rather than actually setting up HTTPS, outside of Send itself a bunch of stuff becomes impossible (you presumably don't want to do any of this stuff, but if you ever do try it just won't work) because you lack Secure Context, and gradually over time you can expect more errors and problems.

Already if you give me a plaintext HTTP link I'm going to have to consciously decide that's fine and click past the interstitial warning me it wasn't able to be upgraded to HTTPS, if you use it to inject an image somewhere that's otherwise HTTPS, the image just counts as broken unless I go out of my way to authorise it.