AdamM
Ok. Lets see if I understoud correctly:
If a domain on Enhance already has the default DKIM we will also need to add your smarthost dkim to the domain.
Domain will then have 2 DKIM but ONLY your DKIM will be used when sending using your smarthost.
Even not being used, the default Enhance DKIM can be leaved on the DNS, since that does not cause issues.
Until here Im correct? If yes, seems your smarthost works as intended and in a good way!
Also, is there any way when sending using your smarthost the email is signed using Enhance default DKIM?
Thanks!