| Name | Description | Type | Additional information |
|---|---|---|---|
| MailboxMessageKey |
Key of the mailbox message to which this is a reply |
globally unique identifier |
None. |
| Subject |
Subject of the reply, omit to use the subject from the message being replied to |
string |
None. |
| Body |
Content of the reply |
string |
Required Min length: 1 |