Audit a sending domain's deliverability — SPF, DKIM, DMARC, MX, BIMI, blocklists — with a prioritized fix order
Install
npx skills add cognyai/claude-code-marketing-skills --skill deliverability-checknpx skills add cognyai/claude-code-marketing-skills --skill deliverability-check -a claude-code -gnpx skills add cognyai/claude-code-marketing-skills --skill deliverability-check -a codex -ggemini skills install https://github.com/cognyai/claude-code-marketing-skills.git --path skills/deliverability-checkgh skill install cognyai/claude-code-marketing-skills deliverability-checkgit clone --depth 1 https://github.com/cognyai/claude-code-marketing-skills /tmp/cognyai__claude-code-marketing-skills
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/cognyai__claude-code-marketing-skills/skills/deliverability-check ~/.claude/skills/deliverability-check # Claude Code
cp -R /tmp/cognyai__claude-code-marketing-skills/skills/deliverability-check ~/.agents/skills/deliverability-check # Codex, Cursor, Gemini CLI, Copilot, OpenCode