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$ dig example.com. mx +short 0 . It has an interesting MX record. I wonder what this does? Specifically, what should a mail agent do when the MX record poi
by psim1 5y ago
$ dig example.com. mx +short
0 .
It has an interesting MX record. I wonder what this does? Specifically, what should a mail agent do when the MX record points to "." ?
- oftenwrong 5y agoThat's a "null MX", indicating that the domain does not accept mail. https://datatracker.ietf.org/doc/html/rfc7505 https://datatracker.ietf.org/doc/html/rfc7505
- psim1 5y agoThanks! That RFC is new to me.