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# MEComposeSessionError

An error that indicates the compose session is in an erroneous state.

```
struct MEComposeSessionError
```

## Topics

### Indicating Erroneous States

[`invalidBody`](/documentation/MailKit/MEComposeSessionError/invalidBody)

An error that indicates the message’s body is invalid.

[`invalidHeaders`](/documentation/MailKit/MEComposeSessionError/invalidHeaders)

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

[`invalidRecipients`](/documentation/MailKit/MEComposeSessionError/invalidRecipients)

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

[`MEComposeSessionErrorDomain`](/documentation/MailKit/MEComposeSessionErrorDomain)

A constant for the compose session error domain.

### Inspecting Error Information

### Comparing Errors


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