I’ve using Mozilla Relay to generate one new email address for every website that I have to register. Lately it seems tho that the big/medium sites are rejecting any email from mozmail.com, some even say “temporary email services are not allowed”.
Is this just with the service from Mozilla or is it becoming general practice? Is there any service that is still flying under the radar?
To be honest, they will all land on radars as more their usage grows.
You may want to reach out to support, and let them know that you don’t feel okay about them doing this and (if you do) therefore switch to another service provider that doesn’t reject alias emails.