ConnectApi.EmailMessageCapability

If a feed element has this capability, it has an email message from a case.

Property Name	Type	Description	Available Version
`attachments`	List<`ConnectApi.EmailAttachment`>	Attachments in the email message.	36.0
`bccAddresses`	List<`ConnectApi.EmailAddress`>	BCC addresses for the email message.	36.0
`body`	String	Body of the email message.	36.0
`ccAddresses`	List<`ConnectApi.EmailAddress`>	CC addresses for the email message.	36.0
`direction`	`ConnectApi.EmailMessageDirection`	Direction of the email message. Values are: `Inbound`—An inbound message (sent by a customer). `Outbound`—An outbound message (sent to a customer by a support agent).	32.0
`emailMessageId`	String	ID of the email message.	32.0
`fromAddress`	`ConnectApi.EmailAddress`	From address for the email message.	36.0
`htmlExpandEmailThread`	Integer	Start location of previous email thread.	47.0
`isRichText`	Boolean	Indicates whether the body of the email message is in rich text format.	36.0
`status`	`ConnectApi.EmailMessageStatus`	Status of an email message on a case. Values are: `DraftStatus` `ForwardedStatus` `NewStatus` `ReadStatus` `RepliedStatus` `SentStatus`	47.0
`subject`	String	Subject of the email message.	32.0
`textBody`	String	Body of the email message. In version 36.0 and later, use the `body` property. Important	32.0–35.0
`toAddresses`	List<`ConnectApi.EmailAddress`>	To addresses of the email message.	32.0
`totalAttachments`	Integer	Total number of attachments in the email message.	38.0

Apex Developer Guide