rfc7208

Node.js wrapper around Python's spf.check2 function which conforms to both RFC4408 and RFC7208

Sender Policy Framework

Rust email authentication library: SPF (RFC 7208), DKIM (RFC 6376), DMARC (RFC 7489), ARC (RFC 8617), BIMI

SPF Flattener — A lightweight Go tool to "flatten" SPF records by resolving includes, A/MX/PTR/IP mechanisms and producing optimized TXT outputs while respecting the RFC 7208 DNS lookup limit. Ideal for admins and devs who need reliable, prioritized SPF generation, deterministic network ordering, and multi‑TXT segmentation for large SPF datasets.