A quick note to my ISP support team resulted in quick action updating the PTR record for the IP I'm using for my mail server, and the related warnings in the mail logs stopped happening! more »
As I've been migrating my network from one ISP to the other, in tiny steps, mistakes happen. I missed one line in my e-mail server configuration, so no e-mail for a while. more »
I started tinkering with my mail server configuration, and while looking at some of the "can I encourage TLS?" bits I found MTA-STS and learned that there's a whole DNS-based authentication thing I never knew about. more »