Standard warm-up versus warm-up with clicks: which one to choose

"Warm-up with clicks" and standard, open-only warm-up aren't simply better-and-worse versions of the same thing. Clicks add a genuinely stronger signal than opens alone, but the benefit has a ceiling, and past that ceiling the same mechanism starts to look like the fabricated-engagement pattern blocklists are built to catch.

What standard warm-up does

A standard ramp sends mail between a pool of controlled mailboxes, increasing volume gradually, with opens registering as the primary engagement signal. This builds domain and mailbox trust through consistent, growing volume with no obviously spammy behaviour — a reasonable baseline that doesn't depend on simulating deeper engagement.

What warm-up with clicks adds

Click-based warm-up includes links in the exchanged messages and has recipient mailboxes click them, intentionally generating a stronger engagement signal than an open alone. Since providers do weigh clicks more heavily than opens in some reputation calculations, this can plausibly accelerate trust-building compared to open-only warm-up, when the click pattern looks reasonable.

Where the ceiling is

The benefit depends entirely on the click pattern looking like something a real, varied set of recipients would produce — not every message getting an identical, high click rate at a consistent interval. A pool where every single message is clicked, every time, at a near-identical delay, is producing a pattern with almost no natural variance, which is itself a signal of automation regardless of the underlying click mechanism being technically real rather than faked outright.

Plausible:   click rate varies message to message, some messages get no click at all,
             timing between send and click varies realistically
Implausible: every message clicked, every time, within a narrow, consistent
             time window

Why this matters more now than it used to

Validity's Heatwave blocklist, launched 3 September 2026, targets domains used in pools that manufacture opens, clicks, and replies to build reputation artificially. It lists domains rather than IPs, launched with over a million domains already listed, and gives no published threshold for what triggers inclusion. A click-based warm-up pool that produces an unrealistically clean, high click rate is producing exactly the pattern that blocklist is watching for, independent of whether the underlying clicks are "real" in a narrow technical sense — the issue isn't whether a click event fired, it's whether the resulting pattern looks like genuine, varied recipient behaviour.

A practical comparison

How to choose

If a tool's click-based warm-up shows you the actual click rate and timing variance it's producing, and that variance looks plausible, it's a reasonable addition to a warm-up plan. If the tool only reports an aggregate score with no visibility into the underlying click pattern, you have no way to confirm it isn't producing the implausibly clean pattern that creates risk — in that case, a simpler, open-only ramp with genuinely varied content is the safer default.

The honest bottom line

Neither approach, done carelessly, is automatically safe, and neither, done carefully, is automatically dangerous. The determining factor is whether the resulting engagement pattern — clicks included or not — looks like something real, varied recipients would actually produce, not which feature a tool's marketing page leads with.

A question worth asking any vendor directly

If you're evaluating a tool that offers warm-up with clicks, ask specifically what percentage of sends get a simulated click and whether that rate varies or stays constant. A vendor that can answer with a real, varying number is describing something closer to the plausible end of the spectrum; a vendor that can't answer, or describes a fixed rate applied uniformly, is more likely producing the unrealistically clean pattern that carries more risk.

Combining both approaches over time

A reasonable middle path some senders use is starting a new domain on standard, open-only warm-up for the first week or two, then introducing click-based warm-up once a baseline sending pattern is established, rather than running maximum click simulation from day one. This avoids concentrating the riskiest part of the approach at the exact moment — a brand-new domain with no history at all — when scrutiny from filters tends to be highest.

MailPilot includes click-based warm-up as one input among several, with visible variance in how it's applied, rather than treating a maximised click rate as the goal — and makes no claim that any warm-up approach, including its own, is exempt from blocklists like Heatwave.