[Hnrobert42]

Nah. I have hosted my domain for 17 years on google and then fastmail. The hosting is harder than private relay, although not too hard.

But I have only had maybe 3 services ever reject my domain, and those were because the domain contains a number.

[snark42]

I've had some reject my e-mail address because it contains their company name. REI was one (ie it wouldn't allow [e-mail] but would accept [e-mail])

[drdexebtjl]

I had my account marked as suspicious and closed in a financial institution for this a few years ago. They were concerned I was a bad actor attempting to impersonate an employee. It was very annoying, because no one from customer support could talk to me directly, it had to flow through legal. Very stupid.

I have since stopped doing this out of fear that it will actually cause me more headaches with people/systems that don't understand how email works.

[js2]

I was just able to create an account using `rei@<mydomain>` on rei.com w/o any issues. Now, figuring out how to delete the account is another matter entirely...

[snark42]

Cool, they probably changed it, this was years ago. I've had similar issues with other companies, REI is just the only one I can I really recall right now.

[lxgr]

I haven't had an outright rejection, but definitely a few odd moments with call center agents. "[e-mail]" is definitely not the default expectation :)

[janc_]

Should have registered as rei-are-incompetent-idiots@ instead…

[lukeify]

Within the space of 2 weeks I had both Etsy and Mapbox block signups with Proton Mail aliases. The practice is rapidly becoming more common.

[bigstrat2003]

Blocking signups from proton.me is not the same thing as only allowing signups from the big mail providers.

[lukeify]

Great, so all I need to do is to authoritatively check each plausible combination of domains that _might_ work and rule each of them out before I can make my claim, according to you?

What a load of pedantry.