These are some sample deployment scenarios for DKIM Core, with specific suggestions.
Simple deployment. Selector choice, key generation and DNS setup for anyone sending email for themselves, not on behalf of other people.
Customer of an ESP. How to use DKIM Core when sending email via an ESP.
Using a DKIM signer. How to use an existing DKIM signer or DKIM supporting smarthost to attach DKIM Core tokens.
ESP architecture. How to setup an ESP to attach DKIM Core tokens on behalf of your customers.