> ## Documentation Index
> Fetch the complete documentation index at: https://docs.cowboy.inc/llms.txt
> Use this file to discover all available pages before exploring further.

# E1226 — Target mailbox is full

> Target mailbox is full

# E1226 — Target mailbox is full

| Property     | Value               |
| ------------ | ------------------- |
| **Code**     | `1226`              |
| **Slug**     | `E1226`             |
| **Category** | `runtime` (Runtime) |

## What happened

Target mailbox is full.

## Why it happened

The target actor's mailbox has reached its maximum capacity (1,000 messages).

## How to fix

Drain the mailbox or reduce the send rate.

## Receipt example

```json theme={null}
{
  "code": 1226,
  "slug": "E1226",
  "category": "runtime",
  "what": "Target mailbox is full",
  "fix": "Drain the mailbox or reduce the send rate.",
  "docs_url": "https://docs.cowboy.inc/errors/E1226"
}
```

***

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