[speakspokespok]

Fastmail let's you set a wildcard when you bring your own domain. Same outcome as other's mention - [e-mail] is my spotify email address. I make it up during login creation and it just works. I've used this technique for every login but not once has it resulted in traceable spam. Logins are all tracked in keepass.

[speakspokespok]

This one time a restaurant owner was demanding email addresses when creating a reservation. I provided the email created using the above technique and explained why.

"if I create an account with Target called [e-mail] and I start seeing emails from Walmart sent to target@ then I know Target sold my data."

His eyes got really big and he changed the subject.