Deliverability and domain warm-up

The Deliverability page (sidebar: Compliance → Deliverability) shows the health of every sending domain in your workspace on one screen. The same checks run before a campaign sends, so a problem you can see here is a problem that can hold up a send.

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What the page shows

Each domain you’ve added under Settings → Domain Authentication gets a row. Click a row for details: messages sent, Delivered, Bounced and Complaints counts, DMARC coverage, and any DNS drift. The header shows the reporting window (by default the last 30 days).

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Reputation thresholds

Reputation is judged per domain, per day: The At risk limits match the levels at which Amazon SES starts an account review, and Watch warns you before you get there.

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Refreshing the checks

Owners and administrators see three buttons at the top of the page:

• Check DNS re-reads every domain’s published records and updates drift.
• Sweep blocklists re-checks every domain against the blocklists.
• Recompute reputation recalculates the reputation snapshot from recent sends.

A grey banner tells you when some domains have never been checked or swept. Unchecked is not the same as clean, so run the checks after you add a domain.

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When a domain blocks sending

A red banner at the top lists how many domain issues will block sending, broken down into DNS drift, blocklist listings and at-risk reputation. Before a campaign sends, its sender’s domain goes through these checks: Fix the cause, run the matching check again, and the block clears.

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Domain warm-up

A new domain that jumps from zero to thousands of emails a day gets filtered, because mailbox providers want to see volume grow gradually. A warm-up ramp sets a daily sending cap that grows every day. How the ramp works

• The cap starts at 50 emails on day 1 and doubles each day until it reaches your target. The last day is the target itself. A ramp never lasts more than 60 days.
• Days follow the UTC calendar: a new day starts at 00:00 UTC whether or not you sent anything. When the last day passes, the ramp is complete and the cap is lifted.
• Campaigns and journeys sending from the domain count toward the same daily cap.

What happens when today’s cap runs out

• Campaigns send as many recipients as today’s cap allows. The rest of the send is parked and continues automatically at 00:00 UTC. The campaign page shows a note like “Warm-up: day 2 cap of 100 reached — the rest continues at 00:00 UTC”.
• Journeys send one email at a time. Once the cap is spent, further journey emails from that domain are held until the next UTC day.

Pausing and ending

• Pause warm-up stops all sending from the domain. The pre-send check blocks while a ramp is paused.
• Resume warm-up continues at today’s day on the calendar, not the day you paused. Days keep counting while a ramp is paused.
• End warm-up finishes the ramp early and removes the cap.

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Troubleshooting