When warmup is on, your account exchanges emails with a pool of seed accounts that engage with everything you send - opens, replies, moves from spam to inbox. The quality of those seeds matters: a reply from a healthy, well-reputed seed carries more weight with Gmail and Outlook than a reply from a so-so one.
That quality level is your pool tier. It shows up as a small colored badge on the Email Accounts table, right below the warmup status.
Two things determine your tier:
Your plan sets the baseline. Every account in your organization starts on the tier your subscription grants.
The account's own quality can move it higher. An account that consistently performs well (clean DNS, high inbox rate, low spam rate, no blacklist hits, healthy engagement on warmup) can be promoted to a higher pool tier than the plan's baseline. This is automatic - you don't have to apply for it.
The reverse isn't quite the same: poor performance won't push you below your plan's baseline tier, but it can keep you from earning promotions.
Badge | Seed quality |
|---|---|
 | Entry-level seed pool. Warmup works, but seed engagement is less consistent and reputation builds slower than on paid tiers. |
 | Solid seed pool. Reliable engagement and good reputation. Right for most active senders. |
 | Higher-reputation seeds with consistently clean DNS. Engagement signals carry more weight. |
 | The top of the pool. Best seed reputations, most stable engagement. Fastest reputation building. |
You don't pick the tier manually - it's set by your plan, and individual accounts can rise above the plan's baseline by performing well over time.
Open the Email Accounts table. Under each account's warmup status (Day N or Active), there's a second small badge showing that account's tier. Different accounts in the same organization can sit on different tiers - some on the plan baseline, some promoted higher because of strong performance.
If you hover over the Free Tier or Standard Tier badge, you'll see a tooltip pointing to Upgrade your plan - that's a shortcut to where you can move up.
The differences are most visible during the first week or two of warmup, when your account has no reputation yet and ISPs are forming their first impression.
Inbox-rate climb: higher tiers tend to push past the early "lots of spam placement" phase faster.
Stability: seed engagement on Premium and Ultra is more consistent day-to-day. Fewer wobbles on the warmup chart.
Recovery: if your account hits a rough patch (a bad campaign, a temporary blacklist), higher-tier seeds help reputation recover quicker.
That said, Free and Standard tiers do build reputation - just at a slower, less stable pace. If you're starting out and aren't running urgent campaigns, they're perfectly workable.
Two paths, and they work independently:
1. Upgrade your plan. This raises the baseline for every account in your organization at once.
Go to Settings -> Plan & Usage.
Pick a plan that includes the tier you want.
The change applies immediately - no per-account adjustment needed.
2. Earn it through quality. Even on the plan's baseline, an account that's consistently sending clean and engaging mail can be promoted to a higher pool tier on its own. Things that help:
DNS Health Score 90+ and stable
High warmup inbox rate (80%+)
No bounces or spam complaints from campaigns
No blacklist hits
There's no button for this and no "apply" form. The system promotes accounts automatically when they're earning it. If one account in your org sits on a higher tier than its sibling - that's why.
If you're not sure which plan grants which tier, check the comparison on the plans page or reach out to support.
What Is Warmup - the high-level picture of why warmup matters.
Configuring Your Warmup - the settings you can actually tune per account (tier isn't one of them - it's plan-level).
