Analytics
Track delivery and engagement across your sending with the Metrics dashboard and campaign reports.
mailer123 records what happens to every email — delivered, opened, clicked, bounced, complained — and rolls it up in three places.
Metrics dashboard
The Metrics section is your time-series view. Choose a time range (7, 15, 30, or 90 days) and optionally filter to a single campaign, and you get:
- Summary cards — sent, delivered, opened, clicked, bounced, complained.
- A trend chart — toggle which event to plot (all, delivered, opened, clicked, bounced, complained) across the range.
- Engagement rates — delivery rate, open rate, and click rate.
Filter by channel (domain vs Gmail) or by sending domain to compare backends side by side.
Open and click rates are calculated against delivered mail, and counts are unique per recipient (the first open/click is what's counted).
Gmail-backend numbers are measured differently. Delivery for Gmail sends means the mailbox accepted the message, opens come from a tracking pixel (Gmail pre-caches images, so open rates read high), and clicks are exact. Bounces and complaints aren't available for Gmail. See Gmail sending.
Per-campaign reporting
Every campaign has its own report — headline stats plus a per-recipient breakdown of who opened, clicked, bounced, or unsubscribed. See Campaigns. Use Resend to non-openers from a sent campaign to follow up with people who didn't open.
The message log
For the raw event stream — every individual email and its delivery timeline — use All Mail. It's filterable, exportable, and links to a full per-message history. See Sending email.
How far back your analytics reach depends on your plan's retention window. Older data ages out of the charts on smaller plans — see Send quotas & plans.