Email Is Still Your Highest-ROI Channel. Most Companies Send It Like It's 2009.
Email has been declared dead more times than any channel in marketing, and it has outlived every eulogy. It remains, year after year, the highest-ROI channel available to most businesses — Optimove pegs personalized email at an average 122% ROI, roughly four times typical digital formats. Yet walk into most companies and you’ll find the same program: one monthly newsletter, sent to everyone, about whatever the company wants to talk about. That isn’t email marketing. That’s a broadcast with a subject line.
The mechanism is relevance, and relevance is measurable
The entire performance gap in email comes down to one variable: does the message match the recipient? Mailchimp’s data puts it plainly — segmented campaigns drive about 14% higher open rates and roughly double the click rate of unsegmented blasts. Nothing exotic produced those numbers. Just the difference between “everyone gets everything” and “people get what’s relevant to them.”
The psychology is unglamorous. A subject line earns an open when it promises something the reader actually cares about, which is impossible when the same subject line has to work for a first-time prospect, a ten-year customer, and someone who abandoned a cart yesterday. Those are three different conversations. Send them the same email and you fit none of them — and the cost isn’t just a low open rate. Irrelevant email is the single fastest way to burn a list: every off-target send teaches subscribers to ignore you, and the unsubscribes cluster around exactly the blasts that respected nobody’s context.
There’s a compounding effect on the positive side too. Consumer psychology calls it the goal gradient effect: the closer someone feels to completing something, the harder they’ll work to finish it. Email tuned to where a person actually is — nearly decided, just purchased, gone quiet — meets them mid-motion and accelerates it. Generic email can’t, because it doesn’t know where anyone is standing.
What good looks like
Segmentation doesn’t need to be clever to work. Split the list by stage (prospect, customer, lapsed), by behavior (what they browsed, bought, or ignored), and by recency, and you’ve captured most of the available gain. Personalization then goes beyond the first-name token: the product referenced, the offer chosen, the send time — all shaped by what the recipient has actually done.
The test I’d put to any marketing team: pull the last ten emails we sent. How many could only have been sent to the segment that received them? If the honest answer is “any of them could have gone to anyone,” the list is being spent, not invested. You already paid — in ad dollars and years — to build that audience. The cheapest growth available is simply speaking to it like you know who’s on it.
Baron Belalov is a fractional CMO working with growth-stage and established companies globally.