There's some online tools out there, and an OSS project that'll scan DKIM reports for you - but this was all I could find. Beyond this, there's commercial tooli

There's some online tools out there, and an OSS project that'll scan DKIM reports for you - but this was all I could find. Beyond this, there's commercial tooling / services. I may implement something that keeps a tab on things if I come across any issues.