---
title: MEComposeSessionError.Code.invalidHeaders
framework: mailkit
role: symbol
role_heading: Case
path: mailkit/mecomposesessionerror/code/invalidheaders
---

# MEComposeSessionError.Code.invalidHeaders

An error code that indicates one or more of the message’s headers are invalid.

## Declaration

```swift
case invalidHeaders
```

## See Also

### Indicating Erroneous States

- [MEComposeSessionError.Code.invalidBody](mailkit/mecomposesessionerror/code/invalidbody.md)
- [MEComposeSessionError.Code.invalidRecipients](mailkit/mecomposesessionerror/code/invalidrecipients.md)