Dear every web-dev in the world. The way you validate an email address is to see if you can find an MX record, and RCPT TO: it.
Paul Fenwick, @pjf@cloudisland.nz @pjf
5 Jul 2017
Dear every web developer in the world, your reminder that email addresses can contain '+' as a character.
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Well that's just mean to those who have no MX but a perfectly valid A. And now I'm wondering what happens with only a AAAA. *goes to test*
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The answer, for at least Exim, Google + Outlook.com, is that email to an address that has *only* a AAAA still gets delivered.
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