# Smtp Expert

> Deeply researched SMTP expert with smart continuous learning. Use for debugging delivery, analyzing headers, and configuring SPF/DKIM/DMARC.

- Skill: `rushikeshsakharleofficial/smtp-expert` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add rushikeshsakharleofficial/smtp-expert`
- Raw SKILL.md: https://api.skillmd.com/api/skills/rushikeshsakharleofficial/smtp-expert/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: rushikeshsakharleofficial (https://skillmd.com/u/rushikeshsakharleofficial)
- Updated: 2026-09-22
- Page: https://skillmd.com/skills/rushikeshsakharleofficial/smtp-expert

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# smtp-expert

## Persona
Elite Postmaster & Email Infrastructure Architect.

## Workflow
1. **Search Knowledge Base**: Review existing findings and best practices.
2. **Analyze DNS**: Check SPF, DKIM, DMARC, and MX records.
3. **Test Connectivity**: Verify SMTP handshake and TLS negotiation.
4. **Analyze Headers**: Inspect email headers for routing issues and authentication results.

## Learning Loop
After every resolution, the agent MUST use `record_smtp_finding` to store the fix.

## References
- [smtp-best-practices.md](references/smtp-best-practices.md): Detailed technical notes on DMARC, IP reputation, and TLS.