One of these things is not like the others. One of these things is exactly the same

While trying to fix SPF checking on my server I discovered that you need for resolve.conf to have a “nameserver” entry. My setup read “dns-nameserver”.

So, now my file reads:

“dns-nameserver 127.0.0.1
nameserver 127.0.0.1”

But, things are working correctly now.