Do you do this programmatically? Or with the +suffix@.... trick?

Neither nor. I have my own domain. Every website gets <website>@mydomain. Every email @mydomain gets forwarded to my primary email. As simple as that.

+1. I've been doing this for 20+ years. Every site I register gets a new account following a pattern <prefix><site>@mydomain.com.

Incredibly helpful to track who leaked your email and to whom, better control spammers, etc. Just checked on Have I been Pwned, and I have 30 emails from my domain there [1]. Anecdotally, there's at least another 50-100 email addresses that I get spam regularly, so HIBP is a small subset of all the leaks.

Easy to implement. I use G Suite with Gmail[2], but it works with most other providers.

[1] https://haveibeenpwned.com/

[2] disclaimer: I work for Google, but not on G Suite team, and I pay for the service on my own.

Yeah, the + trick is not that great, because it is quite obvious what your real email is. This way, not so much. One could of course still guess that you are using this trick when they see that your email matches their domain name. If you're paranoid about that, you could of course just use <random string>@yourdomain for every login. And store that in your password manager.

Anything at a custom domain that doesn't look direct to an individual (e.g. not [email protected]) is a big hint to spammers that the owner uses a catch-all and thus any address will get the job done. I suppose you could go with a whitelist for every random address you give out and blacklist the ones that misbehave, but that's a lot of work and, since every company misbhaves these days, including entities like banks, you'll likely miss emails you actually need.

I don't care much about spammers. The filter at FastMail is good enough. What I care about mostly is to make automatically correlating my identity between different websites harder.

> you could of course just use <random string>@yourdomain for every login

You could also use the hash of the domain name with a secret salt value. Then if you somehow lost your login info, you could still figure out what your recovery address was if you still knew the salt.

Nice! Another domain owner here. Never thought to have a sink-all mailbox. Thanks for sharing.

I used to use this trick, but got sick of fighting the bulk spam sent to admin@, postmaster@, etc. the filters got most of it, but damn it was annoying whenever they changed tactics and a small flood would sneak by before being identified by the filters and further spam prevented.

That's why I moved from maintaining my own mail server (with spam filter and activate sync) to a provider. I still own the domain and have a catch-all configured for per-account mail addresses on a subdomain with the mail going to bulk folder on my primary IMAP. The subdomain also prevents the dumbfire admin@... spam.

Only spam I get is on leaked addresses.

Instead of using <service>@, sign-up with <service><secret>@ and forward only the messages that match *<secret>@

Add the email to a virtual address config file.