DKIM

DKIM Explained

• https://postmarkapp.com/blog/explaining-dkim

DKIM In Practice Using Zimra & PowerDNS - could use bind as well.

• https://dkimcore.org/c/keycheck
• https://wiki.zimbra.com/wiki/Configuring_for_DKIM_Signing

5d89e22c-0ab6-11e8-b634-f6242f0cebd4._domainkey

5d89e22c-0ab6-11e8-b634-ffffffffff._domainkey

TXT

"v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffu6IwSCHFw0HoEiTi8B/IRbDHRW8B79d1G0FsiJxUz3NjrfffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffXFEl/5Ojwc9/dc1dpODqpKCOuAK3hhxpZRpCQvcl+uXC3N//Wx04ionNGy6q5RwMW0QjFPkuRxK9lvfIY1QIDAQAB"