Newsletter Delivery and Engagement Metrics Report

When a newsletter is published, Letterhead displays delivery and engagement metrics directly on the newsletter’s page.

How to view newsletter metrics

Go to Emails and click any published edition — the Reports page loads automatically (instead of the composer). Metrics may take up to 1 hour after send time to appear, and update in stages:

• every 15 minutes for newsletters published today;
• every hour for newsletters published 24–36 hours ago;
• once per day after 36 hours.

Bar chart

The chart shows volumes for key metrics (hover for exact numbers):

• Sent — audience members targeted; usually your full subscriber list at send time minus immediately suppressed addresses.
• Delivered — emails that reached recipient mailboxes.
• Accepted — emails the receiving mailbox provider accepted for delivery. This is usually close to Delivered but not identical, since the two are counted at different points in the send — Open Rate and Clickthrough Rate below are both calculated against Accepted, not Delivered.
• Opens — unique recipients who opened the newsletter.
• Unique Confirmed Opens — unique opens that filter out mailbox-provider prefetching, a closer read on genuine human opens.
• Clicks — total links clicked in the newsletter.

Metrics table

• Delivery Rate — Delivered ÷ Sent.
• Open Rate — unique opens ÷ Accepted.
• Click-to-Open Rate — unique clicks ÷ unique opens.
• Clickthrough Rate — unique clicks ÷ Accepted.
• Bounces — bounced emails, with the count split into hard, soft, and other bounces, each with its own count and rate.
• Unsubscribes — recipients who unsubscribed via the footer link.
• Time to Read (minutes) — average reading time.
• Readability Score — how easy your newsletter is to read.
• Avg. Time to First Click — how long it took readers, on average, to click something after the newsletter landed. A short time here means your subject line and opening content are pulling people in fast.

Opens by hour

The Opens by hour card shows when your readers opened this edition: a day-by-hour grid covering the first three days after send, with busier hours shaded darker. A line above the grid calls out the peak — the single day and hour window with the most opens — and hovering any cell shows its exact count. It’s the rhythm behind the peak-opens reading on the scheduling step (see How do I create and schedule a newsletter?): if your audience reliably opens on Tuesday mornings, this is where you’ll see it.

The card names the timezone the times are shown in. Right after a send it notes that opens are still being collected; the picture settles once those first days have passed.

It’s for newsletters Letterhead delivers itself. When a channel sends through a connected provider such as Iterable or Mailchimp, the record of exactly when each reader opened stays with that provider, so the card doesn’t appear on those editions — every other metric on this page still does.

The card also appears only for editions sent to a single audience — one segment, or your whole list of active subscribers. An edition sent to a combination of several segments, or straight to a hand-picked list of email addresses, doesn’t get one: those audiences change from send to send, so there’s no single group whose opening rhythm the grid could honestly show. Every other metric on this page still appears for those editions too.

See who opened your newsletter

Click the Opens metric on the Reports page to open subscriber-level open data: the email addresses that opened, the date, and the number of opens per address (repeat opens are totaled per subscriber). A search bar helps you find a specific subscriber.

You can also multi-select audience tags to assign or remove tags for everyone who performed that action. Tags apply once — they don’t automatically update for future activity — and you can select and reuse multiple tags.

Link performance

Below the metrics table you’ll find a breakdown of every clicked link:

• Total Clicks — all clicks, counting repeat clicks from the same recipient individually.
• Unique Clicks — unique email addresses that clicked at least once.
• Avg. Time to Click — how long it took readers to click that specific link, on average.
• Engagement Level — a quick High (30 seconds or less), Medium (31 seconds to 2 minutes), or Low (over 2 minutes) read on that link’s average time to click, so you can spot your fastest- and slowest-earning placements at a glance.

Other views

• Newsletter Preview takes you to the sent edition’s public page.
• For how an individual subscriber interacted — opens, clicks, subscription events, and delivery activity — see the Audience Profile Activity Log.
• Ran an A/B test? Results appear on this page too — see A/B Tests on Email Subject Lines.

For everything else, see Working in Emails.