---
title: MFMailComposeError
framework: Message UI
role: symbol
role_heading: Structure
platforms: [iOS 3.0+, iPadOS 3.0+, Mac Catalyst 13.1+, visionOS 1.0+]
path: messageui/mfmailcomposeerror
---

# MFMailComposeError

Mail composition errors.

## Declaration

```swift
struct MFMailComposeError
```

## Topics

### Errors

- [errorDomain](messageui/mfmailcomposeerror/errordomain.md)
- [saveFailed](messageui/mfmailcomposeerror/savefailed.md)
- [sendFailed](messageui/mfmailcomposeerror/sendfailed.md)
- [MFMailComposeError.Code](messageui/mfmailcomposeerror/code.md)

### Error Configuration

- [errorDomain](messageui/mfmailcomposeerror/errordomain.md)

## Relationships

### Conforms To

- [CustomNSError](foundation/customnserror.md)
- [Equatable](swift/equatable.md)
- [Error](swift/error.md)
- [Hashable](swift/hashable.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)

## See Also

### Responding to errors

- [MFMailComposeErrorDomain](messageui/mfmailcomposeerrordomain.md)
- [MFMailComposeError.Code](messageui/mfmailcomposeerror/code.md)