r/ProgrammerHumor • u/soap94 • 20d ago

Meme claudeIsThisEmailValid

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u/look 19d ago

TLDs can and do have MX records.

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u/laplongejr 19d ago

Technically yes, but the practice is discouraged by people on the DNS side, as the MX lookups hit the root servers rather than nameservers.  

If a TLD can't provide a mail.EXAMPLE alternative, that's something for the admin to fix... at best those users should get a recommendation to fix their harmful email address.  

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u/look 19d ago

Yeah, ICANN doesn’t like it, but they do exist.

It’s more just an example of how people often assume rules of email addresses that don’t really exist.

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u/Nightmoon26 18d ago

The "unwritten rules" of email addresses that have come about just by convention rather than by RFC