Channel playbook
How to cold email as a solo SaaS founder
Cold email is the only channel here that reaches a specific named buyer on demand, and the only one where the setup mistakes are expensive: sending from an unwarmed domain without SPF, DKIM and DMARC configured can put your main domain in spam filters for months. Once the technical prerequisite is met, the play is short plain-text emails with a single ask, ten to twenty genuinely personalised sends a day, and no automated follow-up sequences pretending to be a person.
The play for Cold email
- Format
- Short, plain-text, one-ask cold email
- Cadence
- 10-20 personalized sends per day
- Prerequisite
- A warmed domain with SPF/DKIM/DMARC configured
This is the same play Beacon uses when it builds a channel plan — not a summary written for this page.
When this is the wrong channel
Cold email is the wrong channel for a low-price self-serve product where the deal size cannot justify the per-email effort, and it is legally constrained: consult the rules that apply to your recipients, particularly under GDPR in the EU and UK, before sending anything.
How to start on Cold email
In order. Each step is doable this week.
- 01
Set up SPF, DKIM and DMARC, and send from a subdomain
This is the prerequisite and it is not optional. Use a separate sending subdomain so that a deliverability problem cannot damage the domain your product and its transactional email live on.
- 02
Warm the domain for two to three weeks
Start at a handful of sends a day and increase gradually. A new domain that suddenly sends a hundred emails looks exactly like a spam source, because that is what spam sources do.
- 03
Build a list of 50 by hand
Named people at named companies, each with a reason they specifically would care. Purchased lists produce bounces, and bounces are what destroy sender reputation fastest.
- 04
Write four sentences with one ask
Why them specifically, what you noticed, what you built, one question. Plain text, no images, no tracking pixels, no logo. It should read like a person typed it, because a person should have.
- 05
Follow up twice, then stop
One follow-up after four days, one after another week, each adding something new rather than "bumping this". Then leave them alone — a third and fourth chase is what earns spam complaints.
What fails
The specific ways this channel goes wrong.
Sending from your primary domain before warming it
The most expensive mistake available on this channel. Damaged domain reputation affects your password resets and receipts too, and it takes months to recover.
Personalisation that is obviously a merge field
"I loved your work at {{company}}" is worse than no personalisation, because it proves the email was automated. If the specific detail is not real, leave it out.
Asking for a 30-minute call in the first email
Too large an ask from a stranger. Ask a question that can be answered in one line; the call follows the reply.
Long sequences on autopilot
Five-touch automated sequences generate complaints, and complaints are what get a domain blacklisted rather than a low reply rate.
Ignoring the legal position
Unsolicited B2B email is regulated differently by jurisdiction and in some it requires a lawful basis you may not have. Check before you send, not after a complaint.
What working looks like
Replies — including the honest "not for us" ones, which tell you the targeting is right and the offer is not. Bounce rate above a couple of percent means the list is the problem and you should stop sending immediately.
Time cost
An hour a day for research and writing. This channel does not survive being rushed.
Cold email: common questions
How many cold emails a day can a solo founder send?
Ten to twenty genuinely personalised sends a day is realistic for one person and safe for a warmed domain. The limit is not the sending capacity but how many you can research properly — volume beyond that arrives as an obvious template.
Do I need a separate domain for cold email?
A separate sending subdomain, at minimum, with its own SPF, DKIM and DMARC records. It means a deliverability problem stays contained instead of taking your transactional email down with it.
How long should a cold email be?
Around four sentences, plain text, one question. Long emails from strangers do not get read, and images, tracking pixels and signature graphics all cost you deliverability for no benefit.
Is cold email legal?
It depends entirely on where your recipients are. B2B cold email is broadly permitted in the US under CAN-SPAM if you identify yourself and honour opt-outs, and is materially more restricted under GDPR in the EU and UK. This is not legal advice — check the rules for the jurisdictions you are actually sending to.
Which of these channels is right for your product?
Paste your product URL and get a ranked channel plan for your own customer segments — the play, the cadence and the prerequisite for each. No account, no card.
The other channels
Last updated 2026-08-03