4 ms·

example.com and example.org were specifically reserved for testing: https://www.iana.org/domains/reserved https://www.iana.org/domains/reserved

• keitmo 6y ago
  I've seen sites that specifically deny @example.com email addresses.
  • duskwuff 6y ago
    Which is perfectly reasonable. They're looking for an email address that they can reasonably expect to deliver mail to, not just an address that is technically valid.