[h1d]

Using + isn't the best method as some services just won't allow having + sign in the email address (probably shitty email address detection) and of course spammers can simply strip the alias parts and send you mail.

You'd have a better luck with *@user.your.domain if you can give each user a unique domain.

[ghostbrainalpha]

Are you suggesting buying a new domain for each email address? That could get extremely expensive to maintain.

I bought a single domain @MyEmail.org, and create a new user for each site I sign up with that forwards to my gmail.

[e-mail], [e-mail], [e-mail] etc...

[h1d]

No. Your case works for a single person but for more people on a single domain, you would want to do,

[e-mail] [e-mail]

(Instead of [e-mail])

[e-mail] [e-mail]

and so on. So, those services have no way of fooling you by tampering with the alias parts.

But of course this isn't easy unless you roll your own mail server.

[ghostbrainalpha]

Thanks for the breakdown. I didn't think about using Sub Domains!