TIL that the “greylisting” on my hosted mail servers is effectively just as bad as blacklisting because, while it might be temporary, if nothing changes anywhere, it keeps happening again, and again, and again.

https://docs.cpanel.net/cpanel/email/configure-greylisting/

So I’m turning it off right now to use client-side spam filtering EXCLUSIVELY. I’d rather teach my users how to use @mjtsai’s #SpamSieve properly than depend on servers doing what servers tend to do, i.e. find problems where there are none.