We have had problems with spammers and scammers signing up in bulk using disposable email domains, and one of the steps we are taking to stop this nonsense is to no longer allow people to use these emails.

Disposable email domains are used to sign up for services using an email that is automatically deactivated after a while. While there is some legitimate use of this, for people who want to conceal their main email addresses, far too many folks use these domains for nefarious purposes.

You can see the full list of disposable email domains here: https://github.com/disposable-email-domains/disposable-email-domains/blob/main/disposable_email_blocklist.conf. There are 5,383 domains as of today.