Mailinator can be pretty hard to use, since so many sites can detect the addresses and block their use.
I've pretty much given up on it, and use Fastmail's very easy aliasing features with my domain. It's not quite as private, but it's a lot more reliable.
The truly clever programmer could open an SMTP session to the mail exchangers specified in your email address, and reject you because they point to mailinator. I know of 0 programmers in the world that have written this code. I think you could ask the vast majority of programmers that work with email addresses and dark patterns to do this, and they wouldn't even know how. So you're probably pretty safe.
I use mailinator all the time and I have never had a problem, however, which is why I don't even have the MX records to host my own anymore.
While I'm sure that works. The main reason I'd use mailinator is for privacy (i.e. not exposing anything associated to me). If I have to use my domain, rather than their free ones, I'm still identifying my domain, so I might as well use my own aliases with my own mail system.
Domains are cheap, and mailinator really ought to register and discard a bunch of $1 specials on a regular basis.
My comment meant: "Bye bye " for me. As in: I'm not using it anymore.
I don't get you man.