Every few weeks someone on Reddit or a sysadmin forum asks some version of: "I have 300 client/prospect domains. How do I check which ones have no DMARC, or a weak SPF, without pasting them one by one into MXToolbox?" Here's a small, dependency-light Python script that does exactly that from public…
Yes, I admit, this is 100% vibecoded, but it scratches an itch i've had for a while. Seems to work for my usecases at this time, but might add some more features in the future. Comments
