54: Immediately After This Book Escapes

I’m buried in final corrections for Run Your Own Mail Server so here’s a snippet from that.

You must be comfortable acquiring and managing TLS and the associated X.509 certificates. Email did not always require TLS, but certificate prices have plunged to zero so TLS is fairly standard. This book uses Let’s Encrypt certificates maintained by ACME, and presumes you can do the same. If your organization insists on purchasing expensive certificates and maintaining them by hand, you are welcome to do...