Mailbox.org already provides 3 different aliases even at the lowest tier, but I’ve already filled those with non-temporary aliases and I don’t really want to pay three times as much just for throwaway-aliases …

While we’re at it, anyone got a good site for temporary addresses that are basically used exactly once? And ideally don’t immediately get flagged as spam addresses.

I’ve been there for several years as well. Works great, and I get pretty much no spam.

At one point they offered “envelope with money sent via postal service” as an anonymous payment option, IDK if they still do that.