The main rule is to get a disposable email address, or any email address, from an organisation you trust not to spy on the emails you intend to receive. But it's a lot of trouble to go to. You could use any email address that you tolerate being spammed - don't you already have one? I have a a gmail address I use for occasional online purchases which I suspect might get spammed and which I'm prepared to abandon. And I've used it for years - gmail catches most if the junk. And if you post it here as 'something AT something.com' it's not very likely to be harvested for spam anyway.

I wonder why Guest specifies this method rather than a PM or posting a link? (Mods: I suggest splitting this email stuff into a tech thread.)