Just a little storytime about Vinted.
I just wanted to register on Vinted to sell some second-hand stuff, because I haven’t had much success elsewhere. I would have never imaged that they will reject my addy.io alias. After a couple of annoying e-mails detailing how to register an account, I was left with the answer on the screenshot after trying to get an explanation why the domain I am paying for (not some random free gmail address) is not worthy of their services…
I had a similar problem - another site rejected my mail. But when I reached to the support, they said it wasn’t the domain itself - it was the TLD that they decline. It does indeed have a bad reputation, I just didn’t know it before buying.