[Answerawake]

Is there some service where I can easily create unlimited custom email addresses for a flat monthly fee? I want to use a unique email for each new website/service. That would go a long way to solving some data leak/privacy problems. The problem with custom domain is I have to maintain it right? I want a service which I don't have to maintain. I used to use new Yahoo accounts but they are a hassle and recently they disabled free auto-forwarding.

[osamagirl69]

You can do this with any email provider that supports a catchall. I personally use fastmail and have been very happy with it. You don't need to 'create' the accounts, you just set it up so that *@yourdomain.com goes to your catchall. When signing up for a new service, you pick a unique/random email. Then you know unambiguously where each email in your inbox came from.

I personally use the website as the email (example, if HN required an email it would be [e-mail]) to make it easier to filter. But this can be gamed/guessed, to be more secure it is better to generate an actual random email for each site and store it in your password manager.

[rzzzt]

Mozilla has such a service: https://relay.firefox.com/

I also remember seeing one Show HN recently that offered similar functionality, but couldn't find it via search. The problem is that if the e-mail alias provider becomes popular enough, their subdomains are soon disqualified from being used when registering to sites.

[notfed]

Protonmail allows wildcard emails from 1 custom domain if you pay for the ~$5/mo plan. No maintaining a mail server, just point your MX records to their servers.

[blfr]

Catch-all support starts at €8 at ProtonMail.

https://protonmail.com/pricing

[wuuza]

spamgourmet.com

I have been using this since 2002. You don't even have to set anything up - just make up addresses on the fly. It's pretty awesome.

[Nextgrid]

I believe Fastmail supports that.