Comment by nneonneo

One of the more under appreciated features of Mailinator is the fact that they’ll take any mail sent their way, regardless of the email address domain. This means that, if @mailinator.com is blocked for a given site, you can use any number of aliases for it and still get through (my personal favorite is @devnullmail.com), or you can even set up an MX record pointing at Mailinator and effectively use a custom domain.