Cold Email Outreach & Deliverability Infrastructure3 min readUpdated September 2026

Running Outbound for Clients and for Yourself at Once

Running outbound for clients and running it for the agency's own pipeline are different jobs, and the agency's own leads usually get whatever mailbox is left over once client work is provisioned. Client sends live under client domains with real budget behind them; the agency's own sends live wherever there's spare capacity, which is exactly backwards from what the agency would tell a client to do.

Lemlist vs Instantly for digital marketing & performance agencies works best as two separate decisions: one for how you run client campaigns, and one for how you run your own.

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The Agency Eating Its Own Cooking, or Not

A prospect evaluating a marketing agency will sometimes check the agency's own outbound quality as a proxy for the work they'd get. An agency that pitches deliverability best practices while sending its own prospecting from an unwarmed domain is an easy thing for a sharp prospect to notice, and it undercuts the pitch before the call even happens.

Lemlist for the Agency's Own New Business

For the agency's own list, usually shorter and higher-stakes than most client lists, Lemlist's personalization does real work: a landing page referencing the prospect's actual campaigns or public ad spend, a LinkedIn step for the marketing leads who ignore a first email. That level of research on your own pipeline is also the best demonstration of what a client should expect once they sign.

Instantly for Client Campaigns That Need Volume

Many client engagements genuinely need volume: testing offers, reaching a long list of small business owners, or running top-of-funnel outreach where personalization at scale isn't realistic within budget. Instantly's rotation across warmed inboxes fits that use case well, provided the client understands upfront what a volume-first campaign can and can't deliver in terms of reply quality.

Why the Agency's Own List Deserves the Better Domain

It's tempting to give client work the best-warmed domains since that's the billable work, but the agency's own pipeline funds everything else. A cold email sequence with no follow-up plan gets far fewer replies than one carried through three to five follow-up steps1, and an agency's own new business list is exactly where that follow-up discipline should be strongest, not weakest.

Setting Client Expectations Before the Campaign Starts

Cold email replies average about 3.43% across large samples of B2B sends2, and sharing that range with a client before launch, not after a disappointing first week, sets an expectation grounded in reality rather than whatever the client assumed going in. An agency that sets realistic expectations up front avoids the awkward conversation where a client assumes every send should get a response.

A Worked Example: What the Agency's Own Funnel Should Look Like

Picture a ten-person agency with a genuinely good client roster and an embarrassing founder LinkedIn message as its only new business motion. Fixing that doesn't require a big rebuild: pick a secondary domain the agency doesn't use for client work, warm it for two weeks, and put together a list of twenty real target accounts, companies whose public marketing the agency could specifically improve, not a generic industry filter.

Write the first email referencing something true about each account's current marketing: a campaign that's clearly underperforming, a channel they're visibly not using, a competitor doing something better. That's the same research a strategist at the agency would do for a paying client's competitive analysis, just pointed at a prospect instead. Run that list through Lemlist with a LinkedIn step for anyone who doesn't reply to the first email, and treat the reply rate on this list as a real KPI the agency tracks in its own dashboard, the same way it would track a client's.

An agency that builds its own funnel this deliberately usually finds the exercise sharpens the actual service too, since researching twenty prospects' marketing gaps is functionally the same skill as auditing a client's.

A minimal build for the agency's own outbound funnel:

  1. Pick a secondary domain the agency does not use for client work.
  2. Warm that domain for two weeks before sending at any real volume.
  3. Build a list of twenty real target accounts whose public marketing the agency can speak to specifically.
  4. Assign the funnel an owner, the way an account lead owns a client relationship, so it stops falling to whoever has a free hour.
  5. Carry each sequence through three to five follow-up steps instead of a single email.

The Excuse That Never Actually Holds Up

We're too busy with client work is the most common reason an agency's own pipeline goes untouched for months, and it's rarely true in the way it sounds. The actual blocker is usually that nobody owns the agency's own new business the way an account lead owns a client relationship, so it falls to whoever has a free hour, which in practice means nobody.

Assign it like a client account: a named owner, a monthly check-in on pipeline status, and a domain and tool setup that's separate from anything touching client sends. That single change, treating the agency's own pipeline as a real account rather than a side project, is usually what actually fixes the neglect, more than any specific tool choice between Lemlist and Instantly ever could.

Executive Capability Standard

What Good Looks Like

A marketing agency running outbound well gives its own new business pipeline the same domain hygiene and follow-up discipline it sells to clients, and sets realistic reply-rate expectations with every client before a campaign launches.

Building The Capability (5-Stage Skill Ladder)

1. Learn:Audit whether the agency's own outbound gets the same domain warmup and follow-up cadence recommended to clients, and fix the gap if it doesn't.
2. Do Manually:Hand-research and personalize a short list of target clients to validate messaging before scaling either the agency's own or a client's campaign.
3. Delegate:Assign a specific team member ownership of the agency's own pipeline, separate from whoever is running client campaigns day to day.
4. Automate:Use Lemlist for the agency's personalized new business list and Instantly for client campaigns that genuinely need volume, rather than defaulting to one tool for everything.
5. Buy:Add reporting that shows every client their expected reply-rate range before launch, so results get judged against a realistic baseline instead of an assumed one.

How to Get Started

Disclosure: We may earn a commission if you buy through some links on this page. It doesn't change what we recommend.

Frequently Asked Questions

Should an agency use the same tool for its own pipeline and every client campaign?

Not necessarily. The agency's own list is usually smaller and benefits from Lemlist-style personalization, while a client running a high-volume test might be better served by Instantly. Match the tool to each list's actual size and stakes rather than standardizing for convenience alone.

How do we stop the agency's own outreach from being deprioritized behind client work?

Treat it as a client account internally, with its own domain, its own warmup schedule, and someone accountable for checking replies weekly. Once it's billable-adjacent work with an owner, it stops quietly losing to whatever client deliverable is due that week.

What reply rate should an agency tell a client to expect from cold email?

Share the range before launch, not after a disappointing first week. Cold email replies average about 3.43% across large samples of B2B sends, so setting expectations around that figure keeps the conversation grounded in reality rather than whatever the client assumed going in.

Sources

Where we quote a benchmark, we show its source. Other figures in this guide are estimates or general guidance, so check them against your own numbers.

  1. Cold email reply rate: no follow-ups vs 3-5 follow-up steps. Woodpecker Cold Email Statistics (20M+ cold emails), 2026.
  2. Average cold email reply rate. Woodpecker Cold Email Statistics (20M+ cold emails sent via platform), 2026.

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