I've had problems with opendkim to find the best way to create records for multiple subdomains.
I've tried using wildcards to cover all subdomains and I have not been able to make it work. I've chosen to use a single key for all my subdomains, but that does not seem to work properly.
/ etc / opendkim / SigningTable
*@new1.example.com new1._domainkey.new1.example.com *@new2.example.com new1._domainkey.new1.example.com
/ etc / opendkim / KeyTable:
new1._domainkey.example.com new1.example.com:new1:/etc/opendkim/keys/new1.example.com/new1.example.com.private new1._domainkey.example.com new2.example.com:new1:/etc/opendkim/keys/new1.example.com/new1.example.com.private
I hoped that it would work for all subdomains, without having to create a new text record for each one of them. The above seems to work for the domain new1.example.com only where I get:
ARC authentication results: i = 1; mx.google.com; dkim = pass
Is it possible to do what I'm trying to do above, use a single text record for multiple subdomains or do I need to create a txt record for each one of them?