Why is my spam rate high when my spam folder is empty?

Because the two things are measuring opposite directions, and both are right. Your Spam Rate is a sending score: it is the share of the warmup emails your mailboxes sent that landed in the spam folder of the people receiving them. Your own spam folder shows the other direction entirely — mail arriving to you. On top of that, when warmup mail does land in your spam folder, WarmySender moves it to your inbox automatically, so your spam folder stays close to empty by design. Neither number is broken; they answer different questions.

WarmySender runs your outreach on autopilot with AI agents across Cold Email, Email Warmup, LinkedIn, Instagram and Multichannel sequences — plus real-time email verification. This guide answers an Email Warmup question: how to read your Spam Rate, and how to check it properly.

What Spam Rate actually measures

Warmup works by having real mailboxes exchange real emails. Every warmup email your mailbox sends goes to another mailbox in the network. When it arrives, WarmySender looks in that mailbox to see where it landed — inbox or spam. That result is recorded against the mailbox that sent it, because it is a statement about your sending reputation.

• Spam Rate = the warmup emails you sent that landed in the recipient's spam folder ÷ the warmup emails you sent whose placement we could confirm.

So a Spam Rate of 30% means that, of the warmup emails from your mailboxes whose placement we confirmed, roughly three in ten arrived in someone else's spam folder. None of those emails were ever in your spam folder. They were never addressed to you.

Why your own spam folder looks empty

There is a second reason your folder is not a good place to check, and it is something we do on purpose.

Your mailboxes also receive warmup mail from other senders in the network. When one of those emails lands in your spam folder, WarmySender finds it and moves it to your inbox. That is one of the most useful things warmup does — moving a message out of spam teaches your email provider that mail like it is wanted, which is exactly the signal that improves placement over time.

The practical effect is that your spam folder is emptied for you, usually within minutes. So on a day when plenty of warmup mail did arrive in spam, you will still open the folder and find very little in it.

The number records where mail landed first

When we rescue an email out of spam, we do not go back and rewrite the figure to say it landed in the inbox. The Spam Rate keeps the first landing, permanently.

That is deliberate, and it is the more useful behaviour. Where a message lands the moment a provider first sorts it is the honest signal about a domain's reputation. If we quietly folded our own clean-up into the number, your dashboard would tell you your mail was landing beautifully at exactly the moment it had started going to spam — and you would find out from your campaign results instead of from us.

How to check the number properly

Since your own folders cannot confirm a sending measurement, use these instead:

1. Check the sample size. Next to the rate we show how many emails it is based on. A percentage built on a handful of emails swings wildly — one message can move it by 20 points. We hold off on a confident reading until there is enough measured mail, and we say so on screen when that is the case.
2. Look at the trend, not one day. A single bad day is noise. A rate that stays elevated across a week is a real signal worth acting on.
3. Check your sending authentication. This is the most common fixable cause. Confirm that SPF, DKIM and DMARC are published for your sending domain — and in particular that your SPF record lists the service you actually send through. It is very common for a domain's SPF to cover the provider that handles incoming mail while the outgoing mail leaves through a different service that the record never mentions.
4. Give a new domain time. Brand-new domains and mailboxes place worse at first. That is normal and warmup is designed to improve it gradually.

What WarmySender does when your spam rate is high

You do not have to react to this yourself. When a mailbox's spam rate rises, WarmySender automatically reduces how much that mailbox sends each day, so it is not pushing more mail through while its reputation is under strain. As placement improves, the daily volume rises again on its own.

This is why a mailbox with a high spam rate often shows a low daily volume at the same time. The two go together, and both lift as placement recovers. Changing the warmup mode by hand will not override it — the protection is there to keep the domain safe.

Frequently asked questions

My spam folder is empty. Doesn't that prove the number is wrong?

No — for two separate reasons, and each one alone is enough. First, your Spam Rate is about mail your mailboxes sent, which lands in other people's mailboxes, never your own. Second, warmup mail that arrives in your spam folder is moved to your inbox automatically, so the folder is emptied for you regardless. An empty spam folder is the expected result either way, and it tells you nothing about the rate.

If you rescue an email from spam, does it still count as spam?

Yes. The figure records where the email landed first, before the rescue. We keep it that way on purpose: the first landing is the honest measure of how your domain is being treated, and hiding it behind our own clean-up would make a worsening problem look fine.

Is there anywhere I can see where my sent warmup mail landed?

The Spam Rate and Inbox Rate on your warmup dashboard are that view — they are built from confirmed placements of your sent mail in recipients' mailboxes. There is no folder you can open to see it, because the mail is not in your account.

How does this relate to my Inbox Rate?

They are two halves of the same measurement, over the same confirmed mail. Inbox Rate is the share that reached the inbox; Spam Rate is the share that went to spam. If one is 95%, the other is 5%. Both are about mail you sent.

What counts as a normal spam rate?

Low single digits is what a healthy, established mailbox looks like. A brand-new domain often starts higher and improves over its first weeks as warmup builds reputation. A rate that stays high for more than a week or so usually points at something fixable — most often the sending authentication on your domain.

My daily volume dropped at the same time. Are the two related?

Yes. When placement worsens, WarmySender lowers that mailbox's daily volume automatically to protect the domain, and raises it again as placement recovers. You do not need to change any setting, and changing the warmup mode will not lift it sooner.

How long before an improvement shows up in the number?

The rate is measured over a rolling window of recent days, so a fix such as correcting a DNS record does not clear it instantly — the older, worse days stay in the window until they age out. Expect to watch it improve over several days rather than overnight.

Still think the number is wrong?

Tell us. We would rather check than have you doubt a figure on your own dashboard.

Email [email protected] with the mailbox address and what you are seeing, and we will look at the recorded placements for that mailbox directly.

Related reading

• Understanding your warmup Inbox Rate — the other half of the same measurement, with a worked example
• Spam Rescue — how we move warmup mail out of spam, and what it does and does not change
• Why warmup emails appear in your inbox — and how they are tidied away
• Why did my warmup volume go down? — the automatic protection that lowers daily sending
• What warmup's receiving states mean — the receiving half, explained
• Full documentation — Cold Email, Email Warmup, LinkedIn, Instagram and Multichannel guides