1 link tagged with all of: open-source + configuration + security + email + spoofing
Links
Mailgoose is a tool for verifying SPF, DMARC, and DKIM settings to help prevent email spoofing. Developed by CERT PL, it supports Polish institutions in configuring their domains correctly. The app relies on libraries like checkdmarc and dkimpy.
email ✓
configuration ✓
spoofing ✓
security ✓
open-source ✓