Source: https://cli.nylas.com/docs/commands/deliverability-send-events-breakdown

# nylas deliverability send-events breakdown

Show send counts and rates per sending domain, agent account, or recipient domain.

Written by [Qasim Muhammad](https://cli.nylas.com/authors/qasim-muhammad) Staff SRE

Published November 3, 2026

Updated November 3, 2026

## What does nylas deliverability send-events breakdown do?

The nylas deliverability send-events breakdown command ranks send counts and delivery, bounce, and complaint rates by sending domain, agent account, or recipient domain. It covers only messages sent from an Agent Account or through Transactional send; messages from connected grants such as Google or Microsoft accounts are not included. Rows past --limit are summed into an (others) row; recipient domain breakdowns cover the last 90 days.

## Usage

```bash
nylas deliverability send-events breakdown [--group-by sending_domain|agent_account|recipient_domain] [--sort KEY:asc|desc] [--limit N] [--json]
```

## Flags

| Flag | Description |
| --- | --- |
| --json | Output as JSON |
| --no-color | Disable color output |
| --verbose(-v) | Enable verbose output |
| --config | Custom config file path |
| --help(-h) | Show help for the command |
| --limit(-n) | Rows to show before the rest are summed into (others), 1-100 |
| --yes(-y) | Skip confirmations |
| --end | Last UTC day, YYYY-MM-DD, inclusive (default: today) |
| --group-by | Dimension: sending_domain, agent_account, recipient_domain (default sending_domain) |
| --sending-domain | Only this sending domain |
| --sort | Sort as <key>:<asc\|desc>; keys: key, sent, delivery_rate, bounce_rate, complaint_rate (default sent:desc) |
| --start | First UTC day, YYYY-MM-DD (default: 6 days before --end) |

## Examples

The nylas deliverability send-events breakdown command ranks send counts and delivery, bounce, and complaint rates by sending domain, agent account, or recipient domain.

### Recipient domains with the highest bounce rate

```bash
nylas deliverability send-events breakdown --group-by recipient_domain --sort bounce_rate:desc
```

### Top 10 agent accounts by volume

```bash
nylas deliverability send-events breakdown --group-by agent_account --limit 10
```

## Troubleshooting

### invalid --start value on a metrics command

Metrics windows take UTC dates in YYYY-MM-DD form, both days included, and can span at most 365 days. Unix timestamps and look-backs are for the activity list commands only.

### No data: recipient_domain breakdowns only cover the last 90 days

Recipient domain data is kept for 90 days. Move --start and --end into that range, or group by sending_domain or agent_account for older windows.

## Related commands

[nylas deliverability send-alerts createCreate a send alert rule.](https://cli.nylas.com/docs/commands/deliverability-send-alerts-create)

[nylas deliverability send-alerts deleteDelete a send alert rule.](https://cli.nylas.com/docs/commands/deliverability-send-alerts-delete)

[nylas deliverability send-alerts listList send alert rules.](https://cli.nylas.com/docs/commands/deliverability-send-alerts-list)

[nylas deliverability send-alerts showShow a send alert rule.](https://cli.nylas.com/docs/commands/deliverability-send-alerts-show)

[nylas deliverability send-alerts updateChange a send alert rule; flags you leave out keep their value.](https://cli.nylas.com/docs/commands/deliverability-send-alerts-update)

[nylas deliverability send-events listList send events (newest first).](https://cli.nylas.com/docs/commands/deliverability-send-events-list)

## Recommended guides

[Track Email Opens, Clicks, and RepliesSend tracked email and receive open, click, and reply events over webhooks from the terminal. Verify the signatures, and learn why email open rates overcount.](https://cli.nylas.com/guides/track-email-opens-replies-cli)

[SMTP Reply Codes ExplainedDecode SMTP reply codes: 2xx success, 4xx transient retry, 5xx permanent. Read bounce DSN enhanced codes and debug delivery from the terminal.](https://cli.nylas.com/guides/smtp-reply-codes-explained)

[Email Bounce Codes Reference (DSN)Decode bounce DSNs: RFC 3463 enhanced status codes (5.1.1, 5.2.2, 4.x.x), hard vs soft bounces, and finding them with nylas email search from:mailer-daemon.](https://cli.nylas.com/guides/email-bounce-codes-reference)

[Validate Email Addresses from the CLIValidate email addresses from the terminal with an RFC 5322 syntax check and a dig MX lookup, then gate nylas email send to cut hard bounces.](https://cli.nylas.com/guides/email-address-validation-cli)

[AI Agent Email Bounce Detection and RetryDeterministic bounce rules for AI agents: classify soft vs hard from DSN codes, retry 4.x.x with backoff, suppress 5.x.x, and escalate edge cases to humans.](https://cli.nylas.com/guides/ai-agent-email-bounce-retry)

[Soft Bounce vs Hard Bounce ExplainedSoft bounces (4xx) are transient and retried for up to 5 days; hard bounces (5xx) are permanent. Code ranges, suppression rules, and terminal detection with the CLI.](https://cli.nylas.com/guides/soft-bounce-vs-hard-bounce)

Run `nylas deliverability send-events breakdown --help` for full help output.