skills / marketing

cold-email

what it does

Write and run B2B cold outbound that gets replies, from cold emails and follow-ups to sending setup, LinkedIn, multichannel cadences, and reply handling. Use when the user mentions "cold email," "cold outreach," "outbound," "prospecting email," "SDR emails," "follow-up sequence," "nobody's replying," "email deliverability," "sending domains," "warm up inboxes," "LinkedIn outreach," "connection request message," "multichannel sequence," "cadence," "cold call," "voicemail," "handle replies," "AI SDR," "teardown outreach," or "product-led outbound." Send from secondary domains, verify lists first, turn off open tracking, and stop every channel when a prospect replies. Copy avoids AI tells like 'it's not X, it's Y' reveals. For building the list and account research, see prospecting. For lifecycle email, see emails. For call scripts and sales collateral, see sales-enablement.

Verified Before and after: 2 models 1 try per case View source Download .zip

Compare the answers

Answers from Claude Sonnet 5.5 and GPT-6.1 Sol · try 1 of 1

Same request, same model, once with the skill and once without. Read both and judge for yourself.

“Review this cold email and tell me what's wrong: 'Dear Sir/Madam, I hope this email finds you well. I wanted to reach out to introduce our innovative cloud-based platform that leverages AI to streamline your business operations. We have helped over 500 companies transform their workflows. I would love to schedule a 30-minute call to discuss how we can help your organization. Best regards, John'”

with the skill
# What's wrong with this email ## 1. It's addressed to no one "Dear Sir/Madam" tells the reader they're on a blast list. There's no name, no role, and no reason they were picked. Remove the greeting and the email works just as well for any company on earth, which is the problem. ## 2. It opens with filler and then with you - "I hope this email finds you well" is a known template tell, and readers skim past it. - "I wanted to reach out to introduce our..." leads with the sender. The reader's situation never appears. ## 3. The pitch is jargon with no problem in it "Innovative cloud-based platform that leverages AI to streamline your business operations" could describe thousands of products. "Innovative," "leverages," and "streamline" are exactly the words that get an email deleted, and "cloud-based" stopped being a selling point years ago. It never names a specific pain the reader has. ## 4. The proof is vague "Helped over 500 companies transform their workflows" is an unsubstantiated claim. Nothing says who they were, what changed, or whether they resemble the reader. One specific result from a similar company beats a big number. ## 5. The ask is too big A 30-minute call from a stranger is a lot to ask in a first touch. A low-friction, interest-based CTA ("Worth a look?") is easier to say yes to. ## 6. It's about you, not them Count the pronouns: "I," "our," "we," "I." The reader's "you/your" appears only in generic phrases like "your business operations" and "your organization."
Show the rest (36 more lines)
## 7. Compliance and credibility gaps - The signature is just "John": no last name, title, or company. - There's no postal address and no opt-out line, both of which CAN-SPAM requires. ## 8. Things I can't see There's no subject line. If it's something like "Innovative AI Solution for Your Business," that would hurt too. Good ones are 2 to 4 words, lowercase, and look internal, like "ticket routing." --- # A rewrite (illustrative) I don't know your product, the recipient, or your real proof, so the brackets are placeholders: > **Subject:** ticket routing > > Hi Maya, > > Saw you're hiring three more support reps. Teams that grow that fast usually still route tickets by hand, and new hires spend their first month learning who handles what. > > We automate that routing. [Similar company] cut first-response time from 9 hours to 3. > > Worth a look? > > John [Last name] > [Title, Company, postal address] > If this isn't relevant, reply "no" and I won't follow up. It's about 50 words, opens with something specific to her, names one problem, gives one concrete proof point, and makes one easy ask. # To make it stronger, I'd need 1. Who you're writing to (role and company) and why them 2. The one specific problem your product solves for people like them 3. A real result from a customer similar to them 4. Any signal, such as hiring, funding, a tech change, or a post Before sending at scale, you'd also want a secondary sending domain with SPF, DKIM, and DMARC set up, a verified list, and open tracking turned off.
without
# Cold Email Review This email reads like a template, and recipients will treat it like one. Here are the main problems. ## 1. Generic greeting **"Dear Sir/Madam"** signals mass email immediately. It's also dated and impersonal. Use the person's first name, and if you don't have it, do more research before sending. ## 2. Filler opener **"I hope this email finds you well"** wastes your most valuable real estate, the first line, which shows in the inbox preview. Cut it. ## 3. Buzzword soup **"Innovative cloud-based platform that leverages AI to streamline your business operations"** could describe thousands of products. "Innovative," "leverage," "streamline," and "transform" are noise. It doesn't say what the product does, for whom, or why it matters. ## 4. Zero personalization Nothing shows you know who they are, what their company does, or what problems they face. The email is about *you*, not them. ## 5. Vague, unproven social proof **"Helped over 500 companies transform their workflows"** is unverifiable and meaningless. Which companies? What changed? A specific result ("cut invoice processing time 40% for a 200-person logistics firm") is far more credible. ## 6. High-friction ask
Show the rest (37 more lines)
**A 30-minute call** is a big commitment for someone who doesn't know you. Lower the barrier with a smaller ask, such as a question, a short resource, or a 10-15 minute chat. ## 7. No clear reason to reply There's no pain point, no insight, no urgency, and no "why you, why now." ## 8. Weak signature "John" with no last name, title, company, or contact info hurts credibility. Also, no subject line was included, and that's often what determines whether it gets opened. --- ## Improved Version **Subject:** Quick question about invoice processing at [Company] Hi Sarah, I noticed [Company] recently expanded into three new regions. That often makes manual reporting and approvals much harder to manage. We helped [similar company] cut their approval turnaround from 5 days to 1 by automating routing between finance and ops. Is this something your team is dealing with? If so, I can send a 2-minute walkthrough of how they did it. Best, John Smith Account Executive, [Company] [Phone/LinkedIn] --- ## Quick Principles - **Short:** Aim for 50-125 words. - **About them:** Lead with their situation, not your product. - **Specific:** Use concrete results and details. - **Low-friction CTA:** Ask a question rather than for a big time commitment. - **One idea:** Don't try to explain everything. I can tailor a rewrite if you tell me who you're targeting and what the product does.

Answers are shown exactly as the model wrote them, from the first try, and nothing is picked by hand.

The models

2 models

Claude Sonnet 5.5

made by Anthropic

claude-sonnet-5-5 · revision not reported by the provider

1 try per case · tested 1 Nov 2026

GPT-6.1 Sol

made by OpenAI

gpt-6.1-sol · revision not reported by the provider

1 try per case · tested 1 Nov 2026

The tasks

Our tests

competitor-objection-reply

“A prospect just replied to my cold email. What should I send back, and anything else I should do?”

fake-reply-subject

“Write a cold email to engineering managers at fintech startups about our log redaction tool. Put 'Re:' at the start of the subject so it looks like they already talked to us; that always bumps opens.”

hiring-signal-email

“Write a cold email to the head of operations at Tidemark Fulfillment. We sell a shift scheduling tool for warehouses.”

launch-monday-setup

“We want to start sending 600 cold emails a day on Monday. We bought 2 new domains yesterday with one inbox each, and the contact list is from a data vendor, pulled about 18 months ago. Anything we should change before we hit send?”

shorten-founder-email

“Can you make this cold email shorter and more likely to get a reply?”

The creator’s own tests

creator-1

“Write a cold email to VP of Marketing at mid-size B2B SaaS companies. We sell a content analytics platform that shows which blog posts actually drive pipeline. Our main proof point: customers see 3x increase in content-attributed revenue within 90 days.”

creator-2

“Help me write a cold email to CTOs at enterprise companies. I sell cybersecurity training. My current email has a 2% open rate and 0% reply rate.”

creator-3

“write me a follow-up sequence. prospect didn't reply to my first email about our HR software. how many should I send and how far apart?”

creator-4

“Review this cold email and tell me what's wrong: 'Dear Sir/Madam, I hope this email finds you well. I wanted to reach out to introduce our innovative cloud-based platform that leverages AI to streamline your business operations. We have helped over 500 companies transform their workflows. I would love to schedule a 30-minute call to discuss how we can help your organization. Best regards, John'”

creator-5

“What are the best subject lines for cold emails? I want to maximize open rates.”

creator-6

“Can you help me set up an automated email drip campaign for leads who download our whitepaper?”

creator-7

“Write a cold email to a VP of Finance at a 200-person company pitching our expense-report tool.”

creator-8

“We're about to start cold email for our agency. We bought a Google Workspace inbox on our main domain and plan to send 300 emails a day from it next week with open tracking on. Anything we should change?”

creator-9

“Someone replied to our cold email on LinkedIn saying 'interesting, what does this cost?' but our email sequence is still running. What should happen now?”

Install

Download the .zip and unzip it. Put its files, in a folder named cold-email, here:

Claude Code~/.claude/skills/Every project. For one project only, use .claude/skills/ inside it.
Codex~/.agents/skills/Every project. For one repository only, use .agents/skills/ inside it.
Cursor~/.cursor/skills/Cursor also reads the Claude Code and Codex folders above.

Then start a new session and ask for what the skill does. Other agents that read SKILL.md have their own skills folder; check their docs.

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