There's a good chance that tumblr@example.org is going to be a real account.
If you started getting spam to tumblr.w8ke2iowieiu3k3@example.org then I'd be suspicious. (I must remember to do this for new things I sign up to.)
If you started getting spam to tumblr.w8ke2iowieiu3k3@example.org then I'd be suspicious. (I must remember to do this for new things I sign up to.)
I must remember to do this for new things I sign up to.
It is a good idea.