This is a pretty big list of domains that are used for temporary mailboxes, domain suffix that are often used by spammers and also free email hosting that many people use to make spam accounts so they can post their crap and give you some hours of extra work to clean everything up.
There’s 3500 domains in this Email Blacklist. You might want to search through it so any domains and such is in the list because if you’re unlucky they could be.
I pasted the full list on Pastebin, so you can grab the blacklist here!
That’s it for today. See you later!