Any kind of “privacy” mail forwarders will be blocked because of their use by scammers. Many services only whitelist the major providers so even if you buy your own domain name to use as a private catch-all mail forwarder they’ll deny registration.
Which websites? I’ve never had a single website (my password manager says I’m registered to over 400) deny my custom domain.
I’ve only had a couple deny my email when I put the website name in my catch-all.
For example: Minecraft denied my email when I used minecraft582@polar.com, but it worked when I took the word Minecraft out. Probably to combat impersonation.
Etsy. Themeforest / envato. Anything that uses istempmail.com and some similar services like https://github.com/micke/valid_email2. Netlify.I have 4 Etsy accounts, all with custom domains?
I’ve confirmed this is no longer the case by registering a new account under a newly registered domain name (from WHOISDS 10/15/23) although I’ll never be able to confirm the email because it wasn’t my domain, but it did allow registration with the email and did not give the “try a new email” message.
This seems to be an ongoing problem at times, but when I tried I had registered my domain with Cloudflare over 24 hours before and the correct DNS including MX/DKIM/etc had been propagated worldwide (confirmed by dnschecker.org) and still got the “try a different email” error from Etsy when attempting to create a new account from a residential IP address.
I’m not alone: https://duckduckgo.com/?q=etsy+custom+domain+name+cant+register+site:reddit.com&ia=web
But I’ve confirmed you are correct, it sometimes has no issues and other times it does. The rest of them I also don’t know currently, but in the past had that issue.
Edit: fixed DDG URL
SimpleLogin works pretty well
So far I had no issues. But its clear at some point it will be blocked since its one simple domain.
