A Go CLI tool to flatten DNS SPF records and output a list of IP addresses.
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Updated
Jan 22, 2026 - Go
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spf-flattener
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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.
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Updated
Nov 24, 2025 - Go
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