For some reason, macOS Mail on Monterey will display remote content for messages in the Spam folder of both my Gmail and Exchange accounts. This is of course unfortunate because the spammer then knows the message sent to me has been opened, hence that my address is valid. I’ve been receiving tens of messages a day (even more than a hundred on some days) for the past months, and I suspect this plays a part in this.
I’ve tried enabling Junk Filtering in Mail — as recommended somewhere else on SE — to no avail. Mail stubbornly displays remote content in both Junk folders.
The only option that definitely works is the one to "disable loading all remote content", but then of course on every mail I’m receiving I have to click on the "show remote content" button, which is annoying.
How can I prevent macOS Mail from displaying remote content for junk mail — as should be the sensible thing to do?