Cold email agency: infrastructure that reaches the inbox, sequences that get replies

Why should cold email never go out from your main domain?

Cold email should never go out from your main domain because one bad campaign can damage that domain's reputation for weeks. When that happens, your invoices, proposals and client replies start landing in spam too. Separate sending domains, such as tryacme.com for acme.com, keep that risk away from the address your business runs on.

How many domains and mailboxes do you need?

You need enough mailboxes that none of them sends more than about 30 cold emails a day. That is the per-mailbox ceiling we work to, and the sizing below follows from it.

Follow-ups count toward the daily total, so a three-step sequence to 100 new contacts a day settles at roughly 300 sends a day once all steps are running.

What does a cold email that gets replies look like?

A cold email that gets replies is short, about one specific problem, and asks one easy question. Ours follow four rules:

1. A reason for writing to this person. Something observable about their business, not a compliment.
2. One problem, stated in their words. Not a list of everything we do.
3. One line of proof. A result from a similar company, with the number.
4. A question they can answer in one word. "Worth a look?" beats "Can we book 30 minutes?"

No images, no attachments, one link at most, plain text. Open and click tracking stays off in most setups because tracking pixels and redirected links are themselves spam signals.

What happens in the first 30 days?

The first 30 days move from setup to full sending volume in four stages. Nothing goes out at volume until the checks in stage two pass.

The list is verified before every launch. Sending to addresses that bounce is the fastest way to burn a new domain, so any list with a bounce risk above 2% is cleaned before it is loaded.

Is cold email legal in the US, UK and EU?

Cold email to businesses is legal in the US, UK and EU when you follow each region's rules. In the US, the CAN-SPAM Act requires an accurate sender, a physical address and a working opt-out. In the UK, PECR allows unsolicited email to corporate addresses but treats sole traders and some partnerships as individuals who must consent first. In the EU, GDPR allows business outreach under legitimate interest if you can justify it and honor objections. This is a summary, not legal advice.

We also build and maintain OutPumper, an Outlook add-in for sending outreach from your own Microsoft 365 mailboxes. If your team lives in Outlook, ask about it on the call.

How much does it cost?

Three fixed-price packages, the same as our Upwork project catalog. Prices are in US dollars, as of October 26, 2026.

Common questions

Who owns the domains and mailboxes?

You do. Domains are registered in your name and mailboxes are created in your Google Workspace or Microsoft 365 account. If we stop working together, everything keeps running without us.

How long before we can start sending?

New mailboxes need about two weeks of gradual warmup before full volume. Setup itself takes 5 to 14 days depending on the package, and warmup starts on day one.

Do you provide the lead list?

We review and clean the list you have, and can advise on sources. Building lists is a separate job, quoted on its own.

Which sending tool do you use?

Instantly or Smartlead in most setups, because both handle mailbox rotation and warmup well. If you already pay for another tool we set that one up instead.