# Advanced analytics

> Read the seven Advanced analytics charts, from SMTP response codes to time to inbox and delivery by provider, and use them to diagnose delivery problems.

The **Advanced** tab of **Email API → Analytics** is for working out why delivery changed, not only that it changed. Its charts break delivery down by final status, by the reply codes receiving servers sent, by speed and by mailbox provider. It's available on Pro, Business, Custom.

The tab uses the same **Sending domain**, **API key** and date range controls as the rest of Analytics, and you can rearrange, resize, add and remove its widgets the same way as on the [Dashboard tab](/docs/analytics/dashboard/). Every widget's **View details** opens a larger chart with a breakdown table.

## The charts

### Emails by status

A stacked chart of outgoing emails created in each period, by the status they ended with: **Delivered**, **Bounced**, **Failed**, **Rejected**, **Suppressed**, **Complained** and **Canceled**. Emails that were opened or clicked count as Delivered on the chart; **View details** lists **Loaded** and **Clicked** separately.

Emails still in progress (accepted, scheduled or attempted) and held emails aren't shown, so the most recent periods can look smaller until delivery finishes.

### Delivery response statuses

A bar chart of the SMTP reply codes from delivery attempts, for example `250` for accepted, `421` or `451` for "try later", and `550` for a rejected mailbox. The eight most common codes are shown, and the rest are grouped as **Other**. Each delivery attempt counts once, so one email that was retried three times adds three codes.

### 4xx and 5xx delivery errors

A stacked chart of delivery attempts that got an error code: **4xx** (temporary, Emailit retries) and **5xx** (permanent, the email bounces). A rise in 4xx means receiving servers are deferring you; a rise in 5xx means they're refusing you.

### Time to inbox

Three lines for successful deliveries: **Average**, **p50** (median) and **p95**. It measures how long the successful delivery attempt took, from starting the SMTP conversation to the receiving server accepting the message. Time spent waiting in the queue or between retries isn't included. **View details** shows how many deliveries fell into each duration bucket, from under 1 second to over 5 minutes.

### Loads and clicks

Total opens and clicks over time, counting every load and click, by when it happened. It needs [tracking](/docs/tracking/) on your sending domains. Apple Mail Privacy Protection and similar features load images automatically, so treat loads as a trend rather than an exact count of readers.

### Failed, rejected, suppressed

A stacked chart of emails that ended without a delivery attempt or with a processing error. **Suppressed** emails were sent to addresses on your suppression list, **Rejected** emails were blocked because the workspace wasn't verified, and **Failed** emails hit an error. See [Email statuses](/docs/logs/email-statuses/).

### Delivery by provider

Delivery rate over time for each recipient mailbox provider: delivered, opened or clicked emails divided by emails sent. Providers are detected from the recipient's domain:

| Provider | Domains |
| --- | --- |
| Gmail | `gmail.com`, `googlemail.com` |
| Outlook | `outlook.com` |
| Live | `live.com` |
| Hotmail | `hotmail.com` |
| Yahoo | `yahoo.com`, `ymail.com`, `rocketmail.com` and other `yahoo.*` domains |
| iCloud | `icloud.com`, `me.com`, `mac.com` |
| Other | Everything else |

Business mailboxes hosted by Google Workspace or Microsoft 365 use their own domains, so they count as **Other**. **View details** lists sent, delivered, bounced, opened and clicked counts per provider.

## Diagnose common problems

| What you see | What it usually means | What to do |
| --- | --- | --- |
| **Bounced** grows in Emails by status, with more `550` codes and a 5xx rise | You're sending to addresses that don't exist, for example from an old or purchased list. | Filter by **Sending domain** or **API key** to find the source, open **Email API → Emails** filtered by status `bounced` to see the replies, and clean the list. [Email verification](/docs/email-verification/) helps before large sends. |
| 4xx errors and `421` or `451` codes rise, and p95 time to inbox climbs | A provider is throttling you, often after a sudden jump in volume or on a new domain or IP. | Check which provider drops in **Delivery by provider**. Spread sends over time and [warm up](/docs/deliverability/warm-up/) new domains. |
| One provider's delivery rate drops while others are steady | That provider is filtering or rejecting you specifically. | Check SPF, DKIM and DMARC on the domain, read the replies on bounced emails to that provider, and see [Best practices](/docs/deliverability/best-practices/). |
| **Suppressed** grows | Your code keeps sending to addresses that bounced or complained before. | Check suppressions before sending, or remove addresses from your own lists. See [Suppressions](/docs/suppressions/). |
| **Rejected** appears | The workspace isn't verified and emails went to non-members. | Request [production access](/docs/workspaces/production-access/). |
| Delivered is steady but loads and clicks fall | Messages may be landing in spam, or tracking stopped working. | Check that the [tracking domain](/docs/tracking/custom-tracking-domain/) is still verified and review [spam checks](/docs/logs/email-details/#spam-checks) on recent emails. |
| Complaints rise | Recipients don't expect or want the mail. | Make unsubscribing easy, send only to people who opted in, and watch the Complaint rate card on the Dashboard tab. |

When a chart points to a problem, go from the trend to individual emails: filter **Email API → Emails** by the same domain, status and dates, and read the **Deliveries** tab of a few affected emails.

## Related

  - [Queryable SQL](/docs/analytics/queryable/): Answer questions the charts don't cover.
  - [SMTP reply codes](/docs/dictionary/smtp-reply-codes/): What each code means.

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Source: https://emailit.com/docs/analytics/advanced/