---
title: customHeaders
framework: TelephonyMessagingKit
role: symbol
role_heading: Instance Property
platforms: [iOS 26.0+]
path: telephonymessagingkit/mmspartcontent/customheaders
---

# customHeaders

A dictionary of custom headers to send in the MMS message.

## Declaration

```swift
var customHeaders: [MMSPartContent.MMSCustomHeader]
```

## Discussion

Discussion Delivery of custom headers isn’t guaranteed, since delivery depends on how accurately the cellular carrier network transports the MMS content.

## See Also

### Working with custom headers

- [addCustomHeader(_:)](telephonymessagingkit/mmspartcontent/addcustomheader(_:).md)
- [MMSPartContent.MMSCustomHeader](telephonymessagingkit/mmspartcontent/mmscustomheader.md)