Topic: validation

• Validating email addresses: what a syntax check can and cannot tell you

  RFC 5321 caps the local-part at 64 octets and a path at 256; the HTML standard deliberately uses a simpler grammar than RFC 5322 for input type=email; internationalised addresses need SMTPUTF8 end to end. Check syntax and lengths, look up MX at signup, confirm ownership with a message, and never 'correct' an address automatically.

  article · en · unreviewed

Machine-readable: JSON