Cold Email Response Rates Fell 90%. Now Sales Teams Risk Killing Phones Too

Cold email response rates collapsed roughly 90% over the past decade, and a contributor writing for Entrepreneur warns that sales teams are now on track to burn the phone channel the same way.

The author, an outbound sales veteran who worked cold email in the mid-2010s, reports that the same volume of outreach now produces just a tenth of the results it once did — not only for him, but for sales reps everywhere. "The problem wasn't email. The problem was how we, as outbound sales reps, responded to the decrease in positive outcomes," he writes.

What happened to cold email?

The decline had a concrete trigger. After the COVID-19 pandemic, Microsoft and Google tightened rules on bulk sending and began blocking and blacklisting domains that engaged in it. The author and the sales leaders he worked with watched email response rates drop from 2–3% to 0.2–0.3% — a roughly tenfold fall.

By 2024, the channel had become untenable for cold outbound. The common fix — sending more emails to bridge the gap — backfired. "Trying to fix the problem with more of the same activity that caused it was like pouring gas on a fire," he writes.

His verdict for sales leaders: when results drop, volume isn't the solution just because it feels safe. It's the easiest lever to pull, but it treats the symptom and ignores the cause.

Why is history repeating on the phones?

Sales teams have returned to cold calling, and the author — who now works with hundreds of sales leaders and their teams — says nearly all of them are bringing the volume playbook along.

Phone carriers are intervening the way email providers did. In the last few years, carriers have cracked down on mass-dialing by applying "spam likely" caller ID labels. More dials mean more spam flags, which mean fewer answers, which trigger more dials. Once a number is flagged, even prospects who would have welcomed the call stop picking up.

If volume-centricity persists, the author argues, the phone channel will soon be as untenable as email.

What should CROs do instead?

The author's advice to Chief Revenue Officers, Chief Sales Officers and Heads of Sales — many facing board mandates to do more with fewer resources — is to treat a drop in results as a warning signal, not a quota problem.

The prescription has two parts:

• Measure outcomes per activity, not total activity. "Precision beats volume every time," he writes. A rep who books three meetings from 40 calls is building something sustainable; a rep who books the same three meetings from 400 dials is burning through goodwill, phone numbers and their own morale.
• Fix the inputs before scaling them. Contact data is wrong 15–25% of the time, so dialing at volume on bad lists multiplies waste. Every call to a wrong number is a wasted dial and one more signal that gets numbers flagged. Cleaning lists, verifying direct dials and prioritizing the right accounts, he argues, will do more for the pipeline than another 100 dials a day.

Is the channel itself broken?

The author likens channel management to foraging: an experienced forager takes only what's needed and leaves the roots in the ground, so the plant keeps producing season after season. Blasting a channel with volume is the sales equivalent of pulling up the roots.

His conclusion is blunt: "the channel isn't the problem; the appetite for volume is." Every channel has a reputation, and burning it hurts everyone who uses it. If sellers collectively resist the instinct to lean on quantity, he argues, they'll get more quality outcomes — and keep harvesting from their channels for a lifetime.