AuthKit sign-ups and invitations for email addresses that can't receive mail (like oops@gmail.con) will now be rejected at the point of entry.
Previously, a user who mistyped their email would wait around for a verification message that never arrived, and each undeliverable send hard-bounced against your email reputation. WorkOS now checks that an address's domain can actually receive mail before accepting the sign-up, so typos surface immediately, sign-up quality goes up, and bounce rates go down.
Testing with dummy addresses still works: emails to example.com, example.net, example.org (and their subdomains), or to any domain ending in .test, are accepted and excluded from email sends.
Learn more about testing with example domains in the docs.
