Hyacinthe - Email Security Engineer AI Skill
# Hyacinthe - Email and Collaboration Security Engineer
## Who Hyacinthe Is
Drop Hyacinthe into Claude and get an Email and Collaboration Security Engineer who once
watched an organisation sit at DMARC p=none for four years because a single unidentified
sender in the aggregate reports was assumed to be the payroll bureau, and who found on
inspection that it was a decommissioned marketing platform nobody had owned since 2019 while
the actual payroll bureau had been aligned the whole time. Hyacinthe does not guess at sender
inventories, does not enforce a policy on a hunch, and does not accept "we cannot go to reject,
it will break something" as an answer without the name of the thing it will break. She treats
email authentication as an inventory problem with a cryptographic enforcement step at the end,
and she treats the gateway as the second line, never the first.
Hyacinthe covers the whole channel: SPF, DKIM, DMARC, BIMI, MTA-STS and TLS-RPT; gateway and
cloud-native filtering architecture and the connector and mail-flow rules that decide what is
even inspected; phishing, spear-phishing, thread hijacking, vendor email compromise and the
Once the file is loaded, talk to it by name: “Serge, check this page.” That is what the name is for. It also keeps several skills apart in one chat.
You are Hyacinthe, an Email and Collaboration Security Engineer who builds the sending inventory from DMARC reports before touching SPF, DKIM, BIMI or the Microsoft 365 tenant baseline. You have been activated to move the domain to enforcement safely.
$4.92/mo, billed yearly. Works in Claude, ChatGPT, Claude Code, Codex and Cursor. Cancel anytime, 14-day refund on the first charge. After checkout we email your setup link.
Complete skill package instant downloadhyacinthe-email-collaboration-security-engineer.md
Pay once, keep foreverInstant download30-day money-back guarantee
Secure checkout by Shopify
Trademarks of their respective owners. KissMySkills is not affiliated with or endorsed by them.
Ask Hyacinthe something hard.
Or have every skill inside your AI.
Questions before you buy? A person answers, usually the same day: hello@kissmyskills.com
// what's inside
What's inside this skill
- SPF, DKIM and DMARC to reject without breaking senders
- Gateway tuning for phishing, BEC and payroll diversion
- Microsoft 365 and Workspace account-takeover detection
- External sharing, guest access and tenant hardening baseline
IT and security teams stuck at DMARC p=none with a phishing queue nobody triages and sharing sprawl nobody measured.
What you're actually buying
Drop Hyacinthe into Claude and get an email security engineer who gets you to DMARC reject without breaking payroll, and finds the mailbox rule hiding the fraud.
Hyacinthe defends the channel most breaches still start in: email authentication done properly with SPF flattening and the ten-lookup limit, DKIM key rotation and selector hygiene, and DMARC taken from none to reject without cutting off a legitimate vendor, plus BIMI; gateway and cloud-native tuning on Microsoft Defender for Office 365, Proofpoint, Mimecast and Abnormal; phishing, spear-phishing and business email compromise including invoice redirect and payroll diversion; account takeover detection in Microsoft 365 and Google Workspace covering illicit OAuth consent grants, forwarding rules and the inbox rules that hide the fraud; attachment and URL detonation and its bypasses; collaboration security across Teams, Slack, SharePoint, OneDrive and Google Drive with external sharing sprawl and guest access; the phish-report triage queue; quarantine and release governance; and the tenant hardening baseline that removes whole classes of attack.
What you get
- →SPF, DKIM and DMARC to reject without breaking senders
- →Gateway tuning for phishing, BEC and payroll diversion
- →Microsoft 365 and Workspace account-takeover detection
- →External sharing, guest access and tenant hardening baseline
How to install
Download the .skill package, open Claude, paste SKILL.md into your Project Instructions or system prompt, describe your requirement, and Hyacinthe builds the answer. Includes a full worked example so you see exactly what you get.
Four steps. Any AI chat.
- 01Download the file
After checkout, the download link lands in your inbox. Save the file anywhere on your device.
- 02Open your AI chat
Claude, ChatGPT, Gemini, Grok, or Copilot - whichever one you already use.
- 03Paste the file contents
Drop it into the system prompt, Project instructions, or custom instructions field.
- 04Start working
Your AI is now configured as a specialist. Ask it anything inside its domain.
No technical knowledge required.
With Unlimited there is nothing to download. Connect your AI once, then just ask: "Load Hyacinthe from KissMySkills."
Questions about this product
What does the Hyacinthe skill do?+
Lock down email and collaboration: DMARC at reject, a tuned gateway, account-takeover detection, and a tenant baseline that kills whole attack classes. Load it once into Claude Projects and you get a configured Email & Collaboration Security Engineer without re-explaining context at the start of every session. This skill is for authorized, defensive security work only. Validate findings in your own environment, follow your rules of engagement and written authorization, and confirm current framework, vendor, and regulatory specifics before you act on them.
How do I install this skill file?+
Download the .skill package (it contains SKILL.md), paste the contents into Claude Projects Instructions or your AI's system prompt, add your own context and start your first session. Works with Claude, ChatGPT, or any AI chat that accepts system prompts.
Which AI tools does this skill work with?+
Works with Claude (recommended), ChatGPT, Gemini, Perplexity and Copilot, and any AI chat that accepts system prompts. Claude Projects gives the best results.
What is included in this download?+
One .skill package delivered instantly after purchase: the full SKILL.md role configuration plus a worked-example file with a real scenario so you see the quality before you rely on it. Pay once, keep forever, yours permanently.
How is this different from using Claude without the Hyacinthe skill?+
Without a skill file your AI starts every session as a general assistant. With Hyacinthe loaded it applies Email & Collaboration Security Engineer methodology from the first message, with consistent quality every time. This skill is for authorized, defensive security work only. Validate findings in your own environment, follow your rules of engagement and written authorization, and confirm current framework, vendor, and regulatory specifics before you act on them.
Do I have to read it myself?+
No. The file is written for your AI to read, not for you. Upload it or paste it in once and the AI takes on the role. After that you just ask it questions the way you normally would. You're welcome to open it and read it, but nothing here depends on you doing that.