There's the problem then. Try and figure out whats not configured properly. You can also test the domain at https://dmarcian.com/ Check you emails from Apple and see make sure your DNS settings match what Apple sent you and also set a DMARC policy, even something basic like v=DMARC1; p=none would do for the time being. Source: 12 months ago

I have published a DMARC record a week ago using the generator at https://dmarcian.com/... I have published SPF and DKIM, which both show as being valid for my domain, but DMARC doesn't show up. I have tried configuring it different ways, adding and deleting, and nothing will get these checkers to show that it's valid. Source: over 1 year ago

Excellent response. I'd also add using https://dmarcian.com to help check along with mxtoolbox.com. Source: over 1 year ago

This is a screenshot from Instantly. Tried using the checker on dmarcian.com as well and it gave me the same error. Source: almost 2 years ago

It's been a few days since I've configured the SPF/DKIM on my domain but the DMARC I put in isn't working. I snagged a record from dmarcian.com. Source: almost 2 years ago

In this post we will discuss how to use efficiently IPSET with CSF (ConfigServer Security & Firewall) Firewall. Unfortunately, I will not discuss what CSF is because it's not within the scope, but you can read about it here. - Source: dev.to / 4 months ago

At the very least, the free ConfigServer CSF is a more robust firewall addon that blocks brute force attempts, mod security failures, and so on. It's relatively easy to install, has a ton of options, and it's easy to whitelist IPs if your users have trouble. The same dev has a virus & malware scanner that's available as a one-time purchase. Source: about 1 year ago

Use CSF (linux only) to cut down some basic attacks https://configserver.com/configserver-security-and-firewall/. Source: over 1 year ago

Seems like a GUI wrapper (other than the graphs) so may not solve the OPs issue of things like Docker complicating the firewall. Source: over 1 year ago

You should not have ANY ports on the home network open to the outside. NONE. If you insist on running a public-facing service at home, use a VPS with an ARGO tunnel. No SQL ports should be open to anywhere, not even on a private net. Use SSH tunnels to access if needed. As long as everything is closed to the outside, a consumer-grade firewall, along with every node on the home network protected by Configserver... Source: over 2 years ago