I had a user of my email server complain about not being able to receive emails from "cock.li". Turns out that this happened because I was using dnscrypt-proxy with cloudflare's dns (as it is the default in my distro) and thus the DKIM check was failing because it was not able to resolve the domain as it is being filtered by cloudflare. I changed to NextDNS after that.
I had a user of my email server complain about not being able to receive emails from "cock.li". Turns out that this happened because I was using dnscrypt-proxy with cloudflare's dns (as it is the default in my distro) and thus the DKIM check was failing because it was not able to resolve the domain as it is being filtered by cloudflare. I changed to NextDNS after that.