--- title: "Harden Your Email Security with JohnDCyber’s SPF, DKIM & DMARC Scanner" url: https://daily.dev/posts/harden-your-email-security-with-johndcyber-s-spf-dkim-dmarc-scanner-kw8hhn0jn source_url: https://systemweakness.com/harden-your-email-security-with-johndcybers-spf-dkim-dmarc-scanner-f4bcd197049c type: article source: "System Weakness" published: 2025-01-01T12:43:58.285Z updated: 2025-01-01T12:44:14.545Z tags: ["security", "cyber", "python", "tools", "dns"] reading_time: 7 upvotes: 3 comments: 0 language: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Harden Your Email Security with JohnDCyber’s SPF, DKIM & DMARC Scanner **[System Weakness](https://daily.dev/sources/systemweakness)** · 7 min read · 3 upvotes · 0 comments ## Summary JohnDCyber’s SPF, DKIM & DMARC Scanner is a Python tool designed to help security engineers and IT professionals detect and remediate misconfigurations in SPF, DKIM, and DMARC records. Proper configuration of these authentication methods is crucial to prevent email spoofing, phishing, and business email compromise. The tool offers features like SPF checks, DMARC verification, DKIM confirmation, and generates comprehensive reports in CSV and HTML formats. It uses Python’s ThreadPoolExecutor for efficient scanning and supports advanced usage with various customizable flags. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Don’t just attend KubeCon \+ CloudNativeCon, Merge Forward your experience\!](https://daily.dev/posts/don-t-just-attend-kubecon-cloudnativecon-merge-forward-your-experience--l0rpp73x8) · CNCF · 0 upvotes · 0 comments - [Announcing H2 2026 KCDs](https://daily.dev/posts/announcing-h2-2026-kcds-m96goajm1) · CNCF · 1 upvotes · 0 comments - [Two months of Open Community Groups](https://daily.dev/posts/two-months-of-open-community-groups-asf52zhbs) · CNCF · 0 upvotes · 0 comments - [CNCF Unveils Schedule for KubeCon \+ CloudNativeCon Europe 2026](https://daily.dev/posts/cncf-unveils-schedule-for-kubecon-cloudnativecon-europe-2026-ikhcoa5cb) · CNCF · 2 upvotes · 0 comments - [CNCF Debuts KubeCon \+ CloudNativeCon Japan 2026 Schedule](https://daily.dev/posts/cncf-debuts-kubecon-cloudnativecon-japan-2026-schedule-xp5pyudub) · CNCF · 1 upvotes · 0 comments --- Tags: [#security](https://daily.dev/tags/security), [#cyber](https://daily.dev/tags/cyber), [#python](https://daily.dev/tags/python), [#tools](https://daily.dev/tags/tools), [#dns](https://daily.dev/tags/dns) [View this post on daily.dev](https://daily.dev/posts/harden-your-email-security-with-johndcyber-s-spf-dkim-dmarc-scanner-kw8hhn0jn)