The double opt-in introduction template (copy and paste)

The double opt-in is one of those small etiquette norms that quietly separates serious operators from everyone else. The first time you receive one, you might not notice. The first time you receive a blind CC instead, you definitely do — and the sender drops a tier in your mental model without ever knowing why.

What follows is the exact two-message template the best-networked founders, investors, and operators in B2B use. It's been tested across thousands of intros and reliably delivers 50-65% reply rates when the underlying relationship is genuinely warm.

Why double opt-in (the math, not the manners)

A blind CC intro creates obligation without consent. The recipient feels socially trapped: respond out of duty to the mutual, or look rude. Sophisticated recipients clock this immediately and downgrade both the sender and the connector in their assessment. The reply happens, but the meeting is half-hearted and the deal doesn't move.

A double opt-in inverts the dynamic. The connector pings the recipient first with a no-pressure check. If the recipient signals interest, the intro flows with momentum. If not, the connector quietly drops it. No one is trapped, the connector's reputation is preserved, and the reply rate when the intro does happen is 2-3x the blind CC baseline.

The math: blind CC intros reply at 18-25%, double opt-in intros reply at 50-65%. You're trading one day of latency for a 2-3x conversion lift and zero reputational tax on your connector. It's the highest-ROI etiquette norm in B2B.

Message 1: To the connector (you write this)

Subject: Quick ask — intro to [Name] at [Company]?

Hey [Connector], hope you're well.

I'm trying to reach [Name] at [Company] about [one-line context — a specific question, a partnership idea, a hire conversation]. I've written a short forwardable below. Would you be open to checking with them first to see if it's a fit? Totally fine if the timing's off — no pressure either way, and happy to take it off your plate if it's awkward.

Forwardable:

[Two sentences on who you are and what you're building, with one piece of social proof. One sentence on why this person specifically — not the company, them. One sentence on the ask, with the time it costs them to say yes.]

Thanks for considering. Owe you one either way.

[Your name]

What makes Message 1 work

• Subject line is direct, names the person, and signals the size of the ask in three words.
• The phrase "would you be open to checking with them first" is the magic — it explicitly offers the double opt-in and removes any awkwardness about the connector forwarding cold.
• "No pressure either way" gives the connector a graceful out. People who feel they can say no are dramatically more likely to say yes.
• The forwardable is pre-written. The connector copies, pastes, and forwards in 30 seconds.
• "Owe you one either way" closes the loop emotionally and signals you understand reciprocity.

Message 2: The forward (after the opt-in)

When the recipient signals interest, the connector forwards your blurb with one line of personal context. The template:

Subject: Intro: [Your Name] ↔ [Recipient Name]

[Recipient], meet [Your Name] — building [one phrase] and a sharp operator. Worth a quick exchange on [the context]. I'll let [Your Name] take it from here.

—

[The forwardable blurb you wrote in Message 1, pasted verbatim.]

The recipient replies directly to you. The connector drops off the thread and never has to think about it again.

The five mistakes that turn a double opt-in into a cold email

• Writing a forwardable that's three paragraphs long. Three sentences, always.
• Not naming the recipient specifically — using "the right person at [Company]" instead. Vague asks get vague responses.
• Asking for "thoughts" or "to pick their brain." Specific asks get specific yeses.
• Forgetting the social proof. One piece — investor name, customer logo, ex-employer — buys the recipient's attention.
• Not following up with the connector. Close the loop in 48 hours with what happened, every time.

When to skip the double opt-in (rare, but real)

Three situations: (1) you and the recipient have already met and the connector is just refreshing the thread, (2) the connector has explicit standing permission to forward freely (board members to portfolio companies, for example), (3) the ask is so light — a one-line question, a quick favor — that the formality is overkill.

Everything else: double opt-in. Every time. The 2-3x reply lift compounds across a year of intros into the kind of pipeline difference that shows up on a board deck.

Bottom line

The double opt-in is the single most leveraged etiquette norm in B2B. Five extra minutes of process for a 2-3x conversion lift, zero downside risk, and a quiet but real reputational compounding effect that pays off over years.

Steal the template. Use it on every intro from this Monday forward. Track the reply rate against your previous baseline. The data writes the case for you in a month.

Put this into practice

Introd is the relationship intelligence platform behind the teams running the playbook in this essay. We map your team's collective network, score the trust on every edge, and surface the warmest path into every account, candidate, or investor you care about — in seconds, not weeks.

Founders use Introd to compress fundraises from six months to six weeks. Revenue teams use it to lift outbound reply rates from 2% to 40%. Operators use it to hire through second-degree paths that LinkedIn InMail can't see. If any of that sounds like the quarter you're trying to engineer, request access and we'll set you up the same day.