Warmup should react to real signals about your sending reputation — not to blind spots in the data. We made the nightly warmup adjustment smarter about one specific case: what to do when it can't see any opens at all.
What changed
Every night, FirstSales reviews each sending account and nudges its daily send limit and warmup score based on health signals — bounces, replies, and open rate. Open rate is a meaningful input, but only when opens are actually being measured.
If open tracking is briefly unavailable across the board, every account looks like it has a 0% open rate. That's not a sign of poor sending performance — it's a sign that the measurement system has a gap. Previously, the nightly warmup job couldn't distinguish between the two cases. A tracking interruption could cause healthy senders to be scored as if they were genuinely underperforming, resulting in reduced daily limits and lower warmup scores that then required days of normal sending to recover.
How the fix works
Warmup now recognizes that situation explicitly. When zero opens are recorded across all of your senders in the scoring window — the fingerprint of a tracking interruption rather than genuine underperformance — the open-rate check is suspended for that night's run.
Bounce and reply signals still apply in full. So a sender that is genuinely unhealthy — one generating hard bounces or complaint signals — is still caught, throttled, and protected. But no account that sent cleanly all day gets penalized for a data gap it didn't cause.
Concretely: if the tracking pixel is briefly offline when the nightly review runs, a healthy sending account holds its daily limit, keeps its warmup score intact, and resumes full open-rate scoring the following night once opens are flowing again. The adjustment reason is also logged, so every scoring decision is auditable.
Why warmup decisions compound
Warmup isn't a one-night calculation — it's a cumulative ramp. A single night of incorrectly downgrading a healthy sender can cut that account's daily limit and set its score back meaningfully. Recovering from an unnecessary penalty means days of below-capacity sending while the score climbs back up, which delays campaign launches and reduces the total volume you can run through a fully warmed sender.
By separating "no opens because performance is poor" from "no opens because measurement is offline," warmup stays on its intended trajectory through infrastructure blips that are invisible from a sending perspective. Your sender keeps building reputation at the pace its actual health deserves.
What this means for your outreach planning
For anyone managing multiple senders across a high-volume workspace, this fix removes a category of variance from warmup progression. Scores and daily limits now reflect genuine sending health rather than incidental measurement gaps. When you plan campaign capacity around expected warmup levels, those projections are more reliable because warmup isn't being disrupted by events outside your control.
What you should do
Nothing — this runs automatically in the nightly warmup pass. You will see steadier, more trustworthy warmup behavior, especially across the rare moments when tracking infrastructure is briefly unavailable. Check the Warm Up tab on any connector to see the current score and daily target, and review the seven-day chart to confirm the progression matches expectations.