Where this lives. Sign in and open /deliverability in the app.
What it does
Deliverability reads authentication, reputation, warmup, and throttle signals for every domain and mailbox in the workspace. Campaigns cannot launch while a domain's critical checks are failing, so this is the page to check first when a launch is blocked.
Before you start
- Domain authentication and blocklist checks are read-only DNS lookups. They change nothing and need no approval to run.
- Fixing a failing record is approval-gated. A prepared DNS fix waits in Command Center, Approvals, before it is written.
- A real inbox placement test needs at least one of your own connected, read-capable seed mailbox. Without one you will only see sandbox results.
Set it up, step by step
- Open Deliverability and review the four summary tiles: Overall readiness out of 100, Domains passing, Warmup at risk, and Send volume in the last 24 hours.
- Click Run all checks to re-run blocklist and DNS readiness across every domain. Domains checked in the last six hours are skipped automatically.
- If a domain is failing, it appears under Remediation. Click "Review prepared fix" to open the approval for the DNS change.
- Scroll to Domain authentication for the full SPF, DKIM, DMARC, MX, and blacklist table per domain, and to DMARC for what Gmail, Outlook, and other receivers actually report about mail claiming to be from your domains.
- Under Inbox placement, click "Test" next to a domain to run a placement test against your own seed mailboxes. Results are split into real tests and sandbox runs, and the two are never mixed together.
- Check "Receivers refusing your senders" for any active refusals, and "Warmup network, live activity" for how your warming mailboxes are actually performing.
What you should see
- Each domain's SPF, DKIM, DMARC, MX, and blacklist status as a badge, plus a readiness score, and when the blacklist was last checked. A stale "clean" result is labeled as stale, not shown as current.
- DMARC pass rate per domain, with failing sources listed: either a sender of yours missing from SPF or DKIM, or someone spoofing your domain.
- Inbox placement broken out by target, with inbox, spam, and promotions percentages per provider. A "sandbox" tag marks simulated runs, and only real, non-simulated results count toward the summary numbers.
- "Receivers refusing your senders" lists any mailbox or host a receiving provider has refused recently, with the receiver's own wording shown under "What the receivers actually said," and whether that pair is currently on hold.
Common problems
- A 5.7.x refusal is a verdict about your sending account or its host, not about the recipient. It means a receiving mail server is refusing to accept mail from you right now. The recipient is never suppressed for one; it shows up here, on Deliverability, and the pair simply cannot send to that provider until the hold clears. See Blocklist for how this differs from suppression.
- Under the current policy, one mailbox that collects 3 refusals from a single provider inside a 6-hour window is held from that provider for up to 12 hours. A whole host, usually a shared IP, is held after 25 refusals. A hold lifts on its own once refusals stop, and the next refusal has to re-earn it.
- "Warmup at risk" counts mailboxes whose warmup needs attention. Check the mailbox's own page under Accounts for the actual reason before assuming it is a domain problem.
- A domain that has never been checked blocks campaign launch. Run "Run all checks" first if a campaign's launch readiness is failing on it.
Related
Common questions
Why are my cold emails going to spam?
In order of weight: a domain that is too new or was never warmed; authentication that does not pass, most often a duplicate SPF record or a DKIM key that is published but not signing; a list with enough bad addresses to push hard bounces above two percent; volume that jumped suddenly; and a complaint rate above 0.1 percent. Content matters least of the five, which is why a well-written email from a cold domain still lands in spam.
How do I check if my cold emails are landing in spam?
Run a placement test, which sends to seed mailboxes at Gmail and Outlook and reports where each one landed. Then read Google Postmaster Tools for the domains you send to Gmail from: it is free and it shows the complaint rate the filter actually sees.
What is a safe spam complaint rate for cold email?
Below 0.1 percent, and never at 0.3 percent. Google publishes both numbers. At eight sends a day a single complaint takes a mailbox past 0.1 percent for that day, which is a useful way to feel how thin the margin is.
What is the difference between email delivery and email deliverability?
Delivery is whether the receiving server accepted the message at all. Deliverability is where it went afterwards: inbox, Promotions, or spam. A campaign can show 99 percent delivered and almost no inbox placement.
How do I fix authentication problems?
Check the records against a public resolver rather than the registrar dashboard, because the dashboard shows what you saved and the provider sees what a resolver serves. The free checker on this site reports duplicate SPF records and include chains past the ten-lookup limit, which are the two failures that break most setups.
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Last updated September 19, 2026. Written by the team that operates the platform.