[leptons]

I do this too, with namecheap.com's email servers... I pay for a few email domains on namecheap, but one is specifically for spam, and I use their "catch all" as well.

So if I sign up for a service like amazon.com, my email address will be amazon.com@[my-spam-domain].com so I know exactly who is selling my email address. I do this for every service that asks for an email address.

I'd never use a "plus" email address from my main email account, which is far too easy for spammers to figure out my real email address from.