I have been pulling my hair with getting OpenDKIM to work on a Debian machine with Postfix. I have been changing my KeyTable, SigningTable, ExternalIgnoreList, InternalHosts files and references like a madman. I have kept getting errors like this in /var/log/mail.log [code]Feb 28 11:21:43 06-135-D2 opendkim[27826]: 5EADD532313: dkim_eom(): resource unavailable: d2i_PrivateKey_bio() failed Feb 28 11:24:00… Continue reading OpenDKIM: error loading key `default._domainkey.mydomain.com’