Abnormal Security Messages

Abnormal Security Messages is a skill for Claude Code from WYRE-AI/msp-claude-plugins. It costs 37 tokens per session (2,434 once invoked), scanned A, original, Apache-2.0.

Email investigation tools for examining a message's headers, attachments, sender reputation, delivery context, and SPF, DKIM, and DMARC checks. SPF, DKIM, and DMARC are standards that help verify who sent an email.

In plain words
What is it for?
Use it for forensic review of a specific email, including its technical headers, attachments, sender, authentication results, and delivery details.
Why use it?
It helps investigate suspicious emails and understand why a message was treated as a threat. It does not trace undelivered mail or manage inbox removal.

Skill for Claude Code

Written for Claude Code: when-to-use in frontmatter.

Part of the abnormal-security plugin — 3 skills, 3 commands, 2 agents shipped together

Good fit Use it for forensic review of a specific email, including its technical headers, attachments, sender, authentication results, and delivery details.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/wyre-ai/msp-claude-plugins/messages
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add WYRE-AI/msp-claude-plugins --skill messages
Clone the repo
git clone --depth 1 https://github.com/WYRE-AI/msp-claude-plugins

Made for: Claude Code.

Or install abnormal-security, the plugin that ships this one along with the rest of its 3 skills, 3 commands, 2 agents.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for Abnormal Security Messages

README.md
[![agentmods](https://agentmods.dev/badge/skills/wyre-ai/msp-claude-plugins/messages/github.svg)](https://agentmods.dev/skills/wyre-ai/msp-claude-plugins/messages)
Your own site
<a href="https://agentmods.dev/skills/wyre-ai/msp-claude-plugins/messages"><img src="https://agentmods.dev/badge/skills/wyre-ai/msp-claude-plugins/messages/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for Abnormal Security Messages

Your own site · 80×15
<a href="https://agentmods.dev/skills/wyre-ai/msp-claude-plugins/messages"><img src="https://agentmods.dev/badge/skills/wyre-ai/msp-claude-plugins/messages.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 37 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,434 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00037 $0.02434
Opus 5 $0.00018 $0.01217
Sonnet 5 $0.00007 $0.00487
Haiku 4.5 $0.00004 $0.00243

Measured 9d ago against content hash 56467d63fe74, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

Abnormal Security Messages scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

msp-claude-plugins/abnormal/abnormal-security/skills/messages/SKILL.md · 261 lines

How it starts

The opening of the file, as written. The whole thing — 261 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Abnormal Security Message Analysis

Overview

Abnormal Security provides deep message analysis capabilities beyond basic threat detection. This skill covers message retrieval, header inspection, attachment analysis, sender authentication results, and delivery context. Use it when performing forensic analysis of specific emails or investigating delivery patterns.

Anti-triggers

  • Where a message went, or why it never arrived — Abnormal sees messages only as evidence attached to a detected threat. It has no delivery pipeline, no queue, and no bounce record, so "trace this email" questions belong to the gateway: use Mimecast Message Tracking.
  • Removing the message from inboxes, or putting it back — that is the remediation surface; use Abnormal Security Threats.
  • Inspecting a message a gateway is holding — everything Abnormal can show was already delivered. Pre-delivery holds are SpamTitan Quarantine or Proofpoint Quarantine.

Message Field Reference

These are response fields describing what Abnormal reports about a message. They are not tool parameters — the only parameters the message tools accept are threatId and messageId. Availability varies by message and by tenant configuration; treat any single field as best-effort.

Core Message Fields

Field Type Description
abxMessageId string Abnormal's identifier for the message, as returned in the abnormal_messages_list response
subject string Email subject line
fromAddress string From header email address
fromName string From header display name
toAddresses string[] All To: recipients
ccAddresses string[] All CC: recipients
bccAddresses string[] All BCC: recipients (if available)
sentTime datetime When the email was sent
receivedTime datetime When the email was received by Abnormal
internetMessageId string RFC 5322 Message-ID header

Read the full file on GitHub · 261 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 9d ago First seen · 261 lines · 37 tokens per session scan A 56467d63fe74

Subscribe to this mod's changes

Abnormal Security Messages is a skill published in the GitHub repository WYRE-AI/msp-claude-plugins (45 stars, last pushed 7d ago), licensed Apache-2.0. It adds 37 tokens to every session and 2,434 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.