3 ms·

uh, nope. Email validation should check there's a valid MX record for the domain in question, and leave it at that.

• Luyt 15y ago
  Or a valid address record. Mailers fall back to 'A' records in the absence of a 'MX' record.
  • mdpm 15y ago
    yes, and we could continue into checking something is actually listening for mail there, etc. But you get my point :)