# Query 3: Large Emails with Attachments from This Month

## Use Case Description  
Find emails from the current month that have attachments and are larger than 1MB. This helps identify storage-heavy emails for cleanup, archiving, or download management.

## Key JMAP Concepts Used
- **Size filtering**: Using `minSize` filter condition
- **Attachment detection**: Using `hasAttachment` filter
- **Date range filtering**: Using `after` for current month
- **Complex filter conditions**: Combining multiple AND conditions
- **Body structure analysis**: Inspecting attachment metadata

## JMAP Request

```json
{
  "using": ["urn:ietf:params:jmap:core", "urn:ietf:params:jmap:mail"],
  "methodCalls": [
    [
      "Email/query",
      {
        "accountId": "u12345678",
        "filter": {
          "operator": "AND",
          "conditions": [
            {
              "hasAttachment": true
            },
            {
              "minSize": 1048576
            },
            {
              "after": "2024-08-01T00:00:00Z"
            }
          ]
        },
        "sort": [
          {
            "property": "size",
            "isAscending": false
          }
        ],
        "limit": 20
      },
      "q0"
    ],
    [
      "Email/get",
      {
        "accountId": "u12345678",
        "#ids": {
          "resultOf": "q0",
          "name": "Email/query",
          "path": "/ids"
        },
        "properties": [
          "id", "threadId", "from", "subject", "receivedAt", "size",
          "hasAttachment", "preview", "attachments", "bodyStructure"
        ]
      },
      "g0"
    ]
  ]
}
```

## Expected Response Structure

```json
{
  "methodResponses": [
    [
      "Email/query",
      {
        "accountId": "u12345678",
        "queryState": "q1234567892",
        "canCalculateChanges": true,
        "position": 0,
        "ids": ["Memail789", "Memail790", "Memail791"],
        "total": 12,
        "limit": 20
      },
      "q0"
    ],
    [
      "Email/get",
      {
        "accountId": "u12345678",
        "state": "s9876543212",
        "list": [
          {
            "id": "Memail789",
            "threadId": "Tthread101",
            "from": [{"email": "designer@agency.com", "name": "Sarah Designer"}],
            "subject": "Final Logo Designs - Hi-Res Files",
            "receivedAt": "2024-08-20T16:45:00Z",
            "size": 5242880,
            "hasAttachment": true,
            "preview": "Hi! Here are the final logo designs in high resolution...",
            "attachments": [
              {
                "id": "att1",
                "blobId": "B789abc123",
                "name": "company-logo-final.psd", 
                "mimeType": "application/octet-stream",
                "size": 3145728,
                "disposition": "attachment"
              },
              {
                "id": "att2",
                "blobId": "B789abc124",
                "name": "company-logo-variants.zip",
                "mimeType": "application/zip", 
                "size": 1572864,
                "disposition": "attachment"
              }
            ],
            "bodyStructure": {
              "id": "root",
              "mimeType": "multipart/mixed",
              "size": 5242880,
              "headers": [...],
              "subParts": [
                {
                  "id": "text1",
                  "mimeType": "text/plain",
                  "size": 524288,
                  "headers": [...]
                },
                {
                  "id": "att1",
                  "mimeType": "application/octet-stream",
                  "size": 3145728,
                  "name": "company-logo-final.psd",
                  "disposition": "attachment",
                  "headers": [...]
                },
                {
                  "id": "att2", 
                  "mimeType": "application/zip",
                  "size": 1572864,
                  "name": "company-logo-variants.zip",
                  "disposition": "attachment",
                  "headers": [...]
                }
              ]
            }
          }
        ],
        "notFound": []
      },
      "g0"
    ]
  ]
}
```

## Explanation of Key Features

### Size-Based Filtering
- `minSize: 1048576` filters for emails larger than 1MB (1,048,576 bytes)
- JMAP size values are in octets (bytes) of the raw RFC5322 message
- Combined with `hasAttachment: true` to focus on attachment-heavy emails

### Date Range Patterns
- `after: "2024-08-01T00:00:00Z"` for current month filtering  
- Can be combined with `before` for precise date ranges
- UTC timestamps ensure consistent timezone handling

### Attachment Analysis
- `attachments` property provides attachment metadata without downloading content
- `bodyStructure` shows complete MIME tree structure
- `blobId` allows selective download of specific attachments

### Size-Based Sorting
- `sort` by `size` descending shows largest emails first
- Useful for storage management and cleanup prioritization
- Alternative: sort by `receivedAt` for chronological order

### Storage Management Use Cases
This query pattern enables:
- **Storage cleanup**: Identify emails consuming most space
- **Bandwidth optimization**: Download large attachments selectively  
- **Archive decisions**: Move old large emails to cold storage
- **Quota management**: Monitor attachment storage usage
- **Mobile sync**: Exclude large emails from mobile device sync

### MIME Structure Navigation
- `bodyStructure` provides hierarchical view of email parts
- `disposition: "attachment"` distinguishes attachments from inline content
- `subParts` array allows recursive parsing of complex MIME structures
- Part IDs enable targeted content retrieval via Email/get bodyValues