> I'm pretty surprised that of the 1.7M domains with an MX record, only 57% > have DKIM
I don't see how one could reliability gather this data from DNS: DKIM allows you to specify a selector in the header of the mail: This mail for example will use 'sx1' as the selector (check out the header ;-) ): > $ dig +short txt sx1._domainkey.blinkenlights.ch > "v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC[....] But without ever receiving a mail from me: how would you know? You could try to send a query for '_domainkey.blinkenlights.ch' and you MAY receive a NOERROR reply - but that's not guaranteed: My DNS will just return an NXDOMAIN: > $ dig txt _domainkey.blinkenlights.ch|grep status: >;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 10153 Regards, Adrian
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