Outbound agency onboarding is everything that happens between the signature and the first email a prospect actually receives. For cold email and LinkedIn it usually takes around 30 days.
Nearly all of that time is building: sending domains and mailboxes, a warm-up of at least 10 to 14 days on every new account, a verified list, the copy, and the profile and proof a buyer checks before replying.
Your share of the work is small, but it sits on the critical path. Hand over access in the first two days. Approve a sample of the list and the copy when they arrive. Have someone free to take calls from the week sending starts.
And judge the first month by what got built. There are no replies to judge yet.
This page covers the part after the contract. If you have not signed anything, start with the prep work to finish before hiring any agency.
What access does an outbound agency need in the first 48 hours?
Access is the first thing that stalls. The agency cannot buy domains, publish DNS records or create mailboxes until someone on your side says yes. Warm-up cannot start before the mailboxes exist, so every day that yes waits moves the whole calendar back by a day.
| Area | What to give the agency | What stays with you |
|---|---|---|
| Domains and DNS | Permission to add records on the sending domains (SPF, DKIM, DMARC, verification), or approval to buy the domains in your company's name | Ownership of every domain and the registrar login |
| Email platform | A role that can create the sending mailboxes (a real campaign runs 20 to 40 of them) on domains separate from your main one | Super admin rights and billing |
| Time with the sender to rework the profile, and a clear plan for which profiles send | The password and the sender's own Sales Navigator seat. Nobody else signs in as you. | |
| CRM and calendar | A user seat in the CRM and a booking link for whoever takes the calls | Deal records and contact history |
| Written inputs | Your ICP, an exclusion list (clients, open deals, partners), what counts as qualified, 2 or 3 case studies with numbers, the offer | Final sign-off on anything said in your name |
| Visibility | Your Google account added to Postmaster Tools for each sending domain, and DMARC reports routed to a mailbox your company owns | Nothing to hand over. This one is for you. |
The LinkedIn row needs more than a table cell. I explained why no agency should sign in to your LinkedIn account and what to give instead.
The visibility row, the last one in the table, is the one I would ask for first, and the easiest to forget.
Google's Postmaster Tools shows, for each sending domain, the share of messages Gmail users mark as spam and the share passing SPF, DKIM and DMARC (Postmaster Tools overview, checked September 2026).
A domain gets in by a TXT or CNAME record in its DNS, and whoever verified it can add you under "Manage users", as long as you have a Google or Google Workspace account (Gmail Help on adding domains, checked September 2026).
One DNS record and one invite. After that you read deliverability yourself instead of in a report.
Same logic for DMARC. The DMARC record names the address that receives the reports, and Google advises a dedicated mailbox or group over a personal inbox, because the volume can get high (Google's DMARC setup guide, checked September 2026). Make it an address your company controls, so the reports do not leave with the agency.
What happens each week, and what is your part?
The table assumes your foundations need only light work. The order matters more than the exact days, because each step waits on the one before it: no mailbox, no warm-up; no approved list sample, no launch.
| Week | What the agency builds | What you do | Done when |
|---|---|---|---|
| 1 | Kickoff, domains bought, SPF, DKIM and DMARC published, mailboxes created and warming, sender profile audited | Grant access within 48 hours, send the exclusion list, confirm offer and case studies, name who reads replies | Every mailbox exists and is warming, and you can see the domains in Postmaster Tools |
| 2 | List built by vertical, generic titles filtered out, emails verified, first drafts of email and LinkedIn messages, profile rewrite | Review a random sample of the list, answer ICP questions within a day | You have signed off the sample and the exclusions are loaded |
| 3 | Sequences finished, video sales letter scripted, warm-up still running | Approve the copy in writing, record the 5 to 10 minute video, confirm the booking link and who owns the calls | Copy approved, video recorded, calendar ready |
| 4 onward | First sends at low volume from warmed mailboxes, replies routed into the CRM, volume raised step by step | Read replies every day, take the first calls, report back which calls were worth having | Replies answered within a day, volume rising only while bounce and spam numbers stay clean |
If the profile, the offer or the case studies need a full rebuild, add weeks, not days.
Here is how that looked for one client, a software development and IT consulting firm in the UK. The work began on March 13 2023, and the first 33 to 34 days went into foundations. The month I later reported on ran from April 17 to May 17 2023.
I broke down what that single month produced in my month-by-month look at the first 90 days.
Why is the first month mostly setup?
Founders hear "around 30 days" and assume the agency is slow. Count what must be in place before a single prospect gets an email.
New mailboxes start with no reputation. I do not send to a prospect from a new account until it has warmed for 10 to 14 days. A real campaign needs 10 to 20 domains holding 20 to 40 mailboxes, and every one of them warms on that same clock, so there is no single account you can rush. The full build is in the sending setup I walk through step by step.
Then come the providers' rules. Google wants every sender authenticated with SPF or DKIM, and anyone sending Gmail users over 5,000 messages a day needs SPF, DKIM and DMARC together. It also wants the spam rate in Postmaster Tools under 0.3%, ideally under 0.10% (Gmail's sender requirements, checked September 2026).
A domain that goes out half configured starts collecting spam reports against a threshold that low, and you cannot take those back.
The list has to be built and verified. The copy has to match an offer you confirmed. None of that is stalling.
The payoff comes after the build. For a German IT company selling UX design, software development and IT consulting, the system booked 34 sales calls in 29 days, and those calls turned into EUR 278,000 in new business.
When I posted that result, the first thing I added under the numbers was the part people skip: building a system like this usually takes around 30 days, and once it is built it can produce results every single day.
One campaign tells you nothing certain about yours, but it shows where the results sit on the calendar: after the build.
Why the first sends are small on purpose
If the first few hundred prospects do not reply, sending to 50,000 will not fix it. You just get a bigger silence.
Low volume in the first weeks of sending is how you find out whether the offer, the list and the copy work while mistakes are still cheap. An agency that opens at full volume on day one is spending your market to learn what a small batch would have told it.
How do you know onboarding is on track before any replies?
You cannot judge results in week two. You can judge work. A good agency sends you these without being chased:
- A list of every sending domain, where it is registered and in whose name
- Postmaster Tools access on your own Google account, with authentication passing on every domain
- Warm-up status per mailbox, with the date each one is cleared to send
- A random sample of the list before launch, with a verification result on every email
- The email and LinkedIn copy in writing, approved by you before anything goes out
- The name of the person reading replies on their side, next to the name on yours
The warning signs are just as concrete. They ask for your LinkedIn password. They want to send from your main company domain. The first time you see a name from the list is when that prospect replies. They promise meetings in week one. Nobody can tell you where the domains are registered.
Any one of those is worth a direct conversation before week three, while changing course is cheap.
How should you review the list sample?
This is the most useful half hour of your whole onboarding. Ask for 20 random rows. The 20 best ones tell you nothing.
Then check them the way my team builds lists in the first place:
- Titles: generic ones like Assistant, Manager or Associate should not be there unless you asked for them
- Companies: the right vertical and size, and not one current client, open deal or partner
- Emails: every address checked with a verification tool (NeverBounce and DeBounce both do this), because bounce rate has to stay under 0.5%
- Fit: would you personally want a call with most of these people next week?
If your honest answer to the last question is no for most rows, stop and fix the targeting before launch. It is the cheapest fix you will ever make. A weak sample is a list problem, and no rewrite of the email fixes a list problem.
Where do founders slow their own onboarding down?
The delays below sit on your side of the table, which is the good news: you control them. None of them look dramatic while they happen.
- Access arrives in week three. The warm-up clock has not started, so launch moves by the same three weeks.
- Copy approval goes to a committee. Four reviewers turn a direct message into a brochure. One person signs off.
- The ICP fits everyone. "B2B companies with 10 to 500 employees" is a market, and a list built on it is too broad to write for.
- There is no exclusion list. Then your biggest client's CEO gets a cold email in week four.
- The offer changes mid-build. The list and the copy were made for the old one, so both start again.
- The reply rate gets judged on the first 200 sends. That is a sample for spotting broken copy or a bad list, far too small to tell you the channel does not work.
- Nobody owns replies or calls. Interested prospects wait two days for an answer and go cold.
Is slow early progress the agency or your foundations?
Sometimes the agency is the problem. Often it is what a buyer finds after the email. In a recent post I put it this way: "Before you scale anything, check your foundations: Is your LinkedIn profile optimized and content-rich?"
Run the full check yourself, in this order:
- Is the sender's LinkedIn profile written for buyers, with recent activity?
- Do you have one clear entry offer, or a menu of services?
- Is there a video sales letter of 5 to 10 minutes that says what you do and who it is for?
- Do your case studies contain real numbers and timeframes?
- Does your website home page tell the same story as the profile?
- Only then: is the list targeted and verified?
Every "no" is something a buyer sees when checking you out after your email, and no amount of copy fixes it.
It is also the order my team builds in: foundations first, then the list, outreach last. Smirnov Consulting Group is a Prague-based B2B outbound lead generation agency that runs cold email and LinkedIn campaigns for founder-led B2B companies and books qualified sales calls.
In 2025 I wrote that the masters in B2B build foundations first, and the amateurs go chasing the next AI hack. It still holds. The IT client behind that post was booking 3 sales calls a month after years of trying, and reached 51 a month by doing it in that order.
Short answers about the first month with an agency
How long before the first campaign goes out?
Around 30 days is normal for cold email and LinkedIn when the foundations are in decent shape. Every new mailbox needs 10 to 14 days of warming first, and the list and copy need your approval. A full rebuild of profile, offer and case studies takes longer. Sends promised in week one mean something is being skipped.
What access does an outbound agency need?
Permission to add DNS records on the sending domains, a role that can create sending mailboxes, a CRM seat and a booking link. Plus your written inputs: ICP, exclusions, qualification bar, case studies. Keep domain ownership, super admin rights and your LinkedIn password on your side.
How much of my time does the first month take?
Less than most founders fear in weeks one to three: a kickoff, fast answers to questions, two approvals (the list sample and the copy) and one short video to record. Your load rises once sending starts, because replies need reading every day and calls need someone to take them.
What if I have no case studies or a decent website yet?
Then building them is the first part of onboarding, and the timeline grows. Write 2 or 3 case studies from past wins, each with a result and a timeframe, anonymized by industry if needed. Sending before they exist spends your list on prospects who check you and find nothing.