Case study

Cold email from separate domains, in the firm’s own name.

kratt set up a cold-email system for an Estonian corporate finance firm, in the firm’s own accounts. It sends from separate domains in the firm’s name, and every mailbox warmed up before the first campaign email. We verified every address before anything was sent to it.

Corporate finance · Estonia · Cold email

How these were measured: This page describes the set-up from our own build records and the sending tool’s settings. The firm is not named and its sending domains are left out, so a reader cannot check these facts from outside.

Evidence class: Client delivery

Reviewed 2026-10-23 · Kratt editorial review

What we built

kratt set up a cold-email system for an Estonian corporate finance firm in the firm’s own accounts. The emails go out from sending domains in the firm’s name, kept apart from its main domain, with SPF, DKIM and DMARC published on each of them. The mailboxes warmed up before any campaign email. We check the contact list against the business register and verify every address before it is loaded. We also run the sending, and every email carries an opt-out link.

  1. Sending domains and mailboxes in the firm’s name, separate from its main domain

  2. SPF, DKIM and DMARC published on every sending domain

  3. A warm-up period for every mailbox before the first campaign email

  4. A list check: rows matched to the business register, one contact per company and every address verified before it is loaded

  5. Plain-text emails with open and link tracking off and an opt-out link in every email

  6. Sequences that stop when a company replies

Ownership

Built in the firm’s own accounts.

We build cold email so that the client owns what it runs on. The sending domains, the mailboxes and the sending-tool workspace are bought in the client’s own accounts, and we work in them as added users. We do not use sending domains that a vendor would own on the client’s behalf.

Sending domains

Separate sending domains in the firm’s name.

We never send cold email from a company’s main domain. The firm sends from new domains registered in its own name, and its main domain stays out of the campaign. We publish SPF, DKIM and DMARC on every sending domain before a mailbox on it sends anything.

Mailboxes and warm-up

Every mailbox warmed up before the first campaign email.

New mailboxes on new domains have no sending history, so each one warms up before it sends a campaign email. Warm-up runs on the sending tool’s default ramp, and we do not speed it up by sending more warm-up email. We never send as an invented person.

The list

Every address checked before anything was sent to it.

Before anything is sent, we check the contact list. Rows are matched to the Estonian business register, each company gets one contact, and role addresses such as info@ are held back. Then every address goes through a verification service, and the ones that come back uncertain or invalid are not sent to.

The emails and the sending

Plain-text emails that stop when a company replies.

The emails go out as plain text with open and link tracking off, so there is no open rate to report. A sequence stops for a company as soon as it replies. Every email carries an opt-out link, and anyone who opts out goes on a block list. Each mailbox has a daily sending cap, and we raise it in small steps.

Ownership and handover

Current owner

The sending domains, the mailboxes on them and the sending-tool workspace are in the firm’s name, and the firm owns the workspace.

Kratt's role

kratt works in the firm’s accounts as an added user. We set up the sending domains and the mailboxes, warmed the mailboxes up, checked and loaded the contact list and configured the sequences, and we run the sending.

Handover

The domains, the mailboxes and the workspace already sit in the firm’s accounts, so nothing has to move at the end. When the work ends, we remove our users.

What this page does not claim

  • Meetings, replies, deals or revenue from this campaign. This page does not publish the campaign’s results.
  • Any number or date from the firm’s campaign. Those are held until the firm approves them.
  • Inbox placement. It was not measured, and a warm-up score comes from the sending tool’s own warm-up pool, so it does not show where campaign email lands.
  • Open or click rates. Tracking is off on purpose, so there are none.
  • That every message passed authentication. The mail records are published, and a published record does not prove that each message passed.
  • That the opt-out path was tested end to end.
  • That the campaign is lawful or “GDPR-compliant”.
  • A/B testing or several versions of each email.
  • That every account involved is in the firm’s name. This page names the ones that are: the sending domains, the mailboxes and the sending-tool workspace.
  • Any price, fee, contract term or delivery time of ours. None is stated or implied.
  • Who the emails went to, or what anyone replied.
Questions

What an owner asks about this work.

Who owns the domains, the mailboxes and the sending tool?

The firm. The sending domains, the mailboxes on them and the sending-tool workspace are in its name, and the firm owns the workspace. kratt works in those accounts as an added user, and we remove our users when the work ends.

Where does the cold email go out from?

From sending domains set up for outreach, in the firm’s name and separate from its main domain. We never send cold email from a company’s main domain, and SPF, DKIM and DMARC are published on every sending domain.

Why warm up the mailboxes first?

New mailboxes on new domains have no sending history. Each one warms up on the sending tool’s default ramp before its first campaign email, and we do not speed that up by sending more warm-up email. A warm-up score shows how the tool’s own warm-up pool behaves. It does not show where campaign email lands.

How is the contact list checked before sending?

Rows are matched to the Estonian business register before use. Each company gets one contact, and role addresses such as info@ are held back. Every address then goes through a verification service, and the ones that come back uncertain or invalid are not sent to.

Did the emails bring meetings?

This page does not publish the campaign’s results: replies, interested companies, meetings or revenue. Numbers and dates from the firm’s campaign wait for its approval. There is no open or click rate either, because tracking is off.

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