email-infra-bounce-audit

email-infra-bounce-audit is a skill for Claude Code from Growth-Today/claude-skills. It costs 157 tokens per session (4,231 once invoked), scanned A, original, MIT.

An audit process for finding the cause of email bounces or blacklist problems and producing a report. A bounce is an email that could not be delivered; a blacklist can cause mail servers to reject messages.

In plain words
What is it for?
Use it to retrieve campaign replies, remove automatic responses, classify hard, soft, and blocked deliveries from mail-server codes, test neutral copy, and assign the cause to the right owner.
Why use it?
It separates infrastructure, contact-list, data, and message-copy problems instead of treating every failed delivery as the same issue.

Skill for Claude Code

Written for Claude Code: installed under .claude/.

Good fit Use it to retrieve campaign replies, remove automatic responses, classify hard, soft, and blocked deliveries from mail-server codes, test neutral copy, and assign the cause to the right owner.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/growth-today/claude-skills/gt
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 Growth-Today/claude-skills --skill gt
Clone the repo
git clone --depth 1 https://github.com/Growth-Today/claude-skills

Made for: Claude Code.

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 email-infra-bounce-audit

README.md
[![agentmods](https://agentmods.dev/badge/skills/growth-today/claude-skills/gt/github.svg)](https://agentmods.dev/skills/growth-today/claude-skills/gt)
Your own site
<a href="https://agentmods.dev/skills/growth-today/claude-skills/gt"><img src="https://agentmods.dev/badge/skills/growth-today/claude-skills/gt/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 email-infra-bounce-audit

Your own site · 80×15
<a href="https://agentmods.dev/skills/growth-today/claude-skills/gt"><img src="https://agentmods.dev/badge/skills/growth-today/claude-skills/gt.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 157 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,231 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.
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 $0.00157 $0.04231
Opus 5 $0.00078 $0.02116
Sonnet 5 $0.00031 $0.00846
Haiku 4.5 $0.00016 $0.00423

Measured 7d ago against content hash 09ffbd8942b0, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

email-infra-bounce-audit scanned grade A with 1 finding 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 7d 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

> `curl` is the primary path on this page, not the 50K+ fallback. The Instantly MCP *is* connected
gt-email-infra/.claude/skills/blacklist-bounce-audit/gt-SKILL.md · 269 lines

How it starts

The opening of the file, as written. The whole thing — 269 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Blacklist & Bounce Audit · [GTM Engineer]

Reads: {SKILL_BASE}/resources/reference.md §7 · Tools: the Instantly MCP (list_accounts, analytics_campaign_overview, list_emails) for the live platform, and the EmailBison REST API (/accounts, /campaigns, /campaigns/{id}/replies) for campaigns still finishing there · optional Notion MCP · Related: dashboard-reading, domain-research · gt-list-building.

These are REST endpoints, not MCP tools. There is no EmailBison MCP connector today, so curl is the primary path on this page, not the 50K+ fallback. The Instantly MCP is connected and covers the same ground for an Instantly workspace — list_accounts, list_campaigns, list_emails — but the field names differ, so don't paste a Bison field into an Instantly call.

Find where a bounce or blacklist problem actually comes from, then produce a report the team can act on. The output is a clear root cause, infrastructure, list/data, or copy, plus a full bounce breakdown and the right owner. Runs on any EmailBison workspace (specify the MCP server / API host). Codes and thresholds in {SKILL_BASE}/resources/reference.md §7.

When to run: monthly/quarterly check-in · bounce rate crosses 3% · before scaling send volume · a client asks "why are my emails bouncing?" · after onboarding new domains/inboxes.

Ask if not provided: which EmailBison MCP server / API host (the workspace), output location for the CSV + report, and an optional Notion page URL to push the report to. Always run against the correct workspace with that workspace's own IDs, never audit the wrong workspace by accident.


Part A, Runbook (pull the data)

Step 0, Workspace baseline

Which platform? Instantly is the primary one and its calls are verified below. Bison is kept for campaigns still finishing there and goes when Bison does. The field names differ — don't paste one platform's field into the other's call.

Read the full file on GitHub · 269 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. 7d ago First seen · 269 lines · 157 tokens per session scan A 09ffbd8942b0

Subscribe to this mod's changes

email-infra-bounce-audit is a skill published in the GitHub repository Growth-Today/claude-skills (3 stars, last pushed today), licensed MIT. It adds 157 tokens to every session and 4,231 once invoked, about $0.0008 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-04.

Related

Other skills, from other repositories

crm-customer-management

Orchestrate CRM workflows across Salesforce, HubSpot, Zoho, and Pipedrive — customer 360 lookups, deal pipeline management, activity logging, and customer onboarding. Use when looking up a customer, checking deal status, logging a call or meeting, reviewing pipeline health, onboarding a new customer, finding stalled…

zavora-ai/skill-crm-customer-management · 0 tokens

spark-engineer

Use when writing Spark jobs, debugging performance issues, or configuring cluster settings for Apache Spark applications, distributed data processing pipelines, or big data workloads. Invoke to write DataFrame transformations, optimize Spark SQL queries, implement RDD pipelines, tune shuffle operations, configure…

Jeffallan/claude-skills · 75 tokens

debugging-wizard

Parses error messages, traces execution flow through stack traces, correlates log entries to identify failure points, and applies systematic hypothesis-driven methodology to isolate and resolve bugs. Use when investigating errors, analyzing stack traces, finding root causes of unexpected behavior, troubleshooting…

Jeffallan/claude-skills · 70 tokens

Reverse Engineering & Binary Analysis

Binary analysis, assembly interpretation, disassembly, decompilation, firmware RE, and protocol reverse engineering.

Masriyan/Claude-Code-CyberSecurity-Skill · 26 tokens

log-analyzer

A log-analysis helper that reads application and system logs to find unusual patterns and likely causes. Logs are records of events such as errors, requests, warnings, and service activity.

laolaoshiren/claude-code-skills-zh · 24 tokens

om-troubleshooter

Diagnose and fix standalone Open Mercato bugs across scope, commands, locking, fields, generated registries, UI hydration, cache/search, bootstraps, queues, and providers. Use for "fix bug", "why does this fail", "regression", "debug", "napraw błąd", or a failing test.

open-mercato/open-mercato · 73 tokens