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Deliverability FAQ

Use these answers to diagnose common domain verification, IP warming, recipient, and open-rate questions.

How long does domain verification take?

DNS verification starts after Bird can resolve the required records. DNS caches can retain an older answer until its TTL expires, so propagation takes some time and varies by provider and TTL setting.
Bird keeps re-checking automatically on a schedule that spaces out over time. If the domain remains unverified, use the verification delays checklist for exact timing and what to check.

Why can't I send to a particular recipient?

Two common reasons, depending on where you are in your setup:
  • The address is suppressed. Bird stops sending to addresses that have hard-bounced, unsubscribed, or complained. Check the suppression list in the dashboard for the reason.
  • You're using the shared onboarding domain. The shared domain delivers only to verified workspace members and sandbox addresses. Verify your own domain to send to other recipients; see the Email sending FAQ.

Do I need to warm up an IP address?

Bird automatically warms a new dedicated IP through 29 stages. During warming, the dedicated IP handles an increasing share of traffic while the shared pool handles the rest.
The shared IP pool does not require customer-specific IP warming. A new domain still builds its own reputation, so increase volume gradually. See the warming article.

Why is my open rate so high (or so low)?

Apple Mail Privacy Protection can prefetch tracking pixels and register opens without a person viewing the message. This makes opens unreliable as a standalone engagement signal.
Treat opens as a rough trend line. Use clicks and conversions as stronger engagement signals. The Apple Mail privacy article explains the mechanics and what to measure instead.

How do I know if my sender reputation is healthy?

Watch the signals mailbox providers watch: bounce rate, complaint rate, and how your engagement trends over time. Your Metrics page shows these signals by domain. Google Postmaster Tools shows how Gmail sees you, and Bird's Email header analyzer verifies whether an individual message passed SPF, DKIM, and DMARC. The reputation monitoring article covers which numbers matter, healthy ranges, and where to look when one drifts.

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