133 UK dental practices, 0 positive replies: what cold email taught me
I emailed 133 independent dental practices in England, 223 emails in total. Zero positive replies. Deliverability was fine. The real mistake was the niche.
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Between July and August 2026 I ran a cold email campaign to independent dental practices in England. I contacted 133 practices and sent 223 emails once you count every follow-up. The result: zero positive replies.
This post is what happened, what I got wrong, and what I’d do differently.
The offer
The idea was simple. Many small practices miss enquiries that come in after hours: a patient fills in a form on Friday evening and nobody sees it until Monday. I offered to build a system that captures those enquiries and gets them answered, as a fixed-price custom build.
How I built the list
I used the CQC care directory, the public register of care providers in England. After filtering it down to active dental practices owned by a single-location provider, and removing anything tied to a chain or brand, I had 7,048 independent practices.
The catch: the CQC file has no email addresses. Only phone numbers and websites. Every email had to be found by hand on the practice’s own website. Roughly 1 in 3 practices I checked had a usable email. About 1 in 5 already had online booking, so I skipped them.
I started in Bristol, then moved to Bath, Cheltenham, Swindon and North Somerset.
How I sent
- One inbox on my own domain, warmed up slowly before scaling.
- Deliverability checked: 10/10 on mail-tester, with SPF, DKIM and DMARC passing.
- Up to three touches per practice, spaced days apart.
- Four message variants: the out-of-hours gap, the cost of one lost high-value enquiry, a very short peer-style note, and a broader custom-software partner pitch.
So the emails were landing in inboxes, and I was testing different angles.
The result
133 practices contacted. 223 emails sent. 0 positive replies. Around 10 declines or bounces, and silence from everyone else. The usual benchmark for cold email is a reply rate of around 3%, so this was well below it.
The declines mostly said the same thing: “we already have that.”
What I got wrong
The emails weren’t the main problem. The assumption behind them was.
I picked the niche because the problem looked real and the practices looked small and underserved. Both were true. But independent UK dental practices have already been pitched AI receptionists and missed-enquiry tools by other vendors. Many already use something. My email was one more pitch in a pile of similar ones.
A good niche isn’t just one with a real problem. It’s one where the problem is still badly solved, not just one that nobody has emailed yet.
What I’d do differently
- Check the market before building the list. A few calls or a look at what tools practices already advertise would have shown the niche was crowded.
- Lead with something they don’t already have. A generic “we capture missed enquiries” offer competes with existing products. A specific gap in their own setup does not.
- Judge earlier. With deliverability confirmed and four angles tested, a clear zero after the first 50 or so sends was already a signal about the offer, not the volume.
I paused the campaign on 21 August and moved my time to conversations that were actually happening. If you’re about to run cold outreach to a niche, spend a day checking who else is already pitching it. It’s cheaper than six weeks of silence.