decodedMessage(forMessageData:)

Declaration

func decodedMessage(forMessageData data: Data) -> MEDecodedMessage?

Parameters

• data:

  The raw MIME message data, which may be encrypted or signed.

Return Value

An object that represents the decoded message, or nil if the message isn’t encrypted or signed.

Discussion

When MailKit needs the original unencoded data for a message, it invokes this method and passes the raw MIME data for the message. If you determine that the message isn’t encoded and your extension doesn’t need to do anything, return nil, and MailKit decodes the message data normally.

If you inspect the message data and determine that you need to decode it, create an instance of MEMessageSecurityInformation that describes the message’s signed and encrypted status. If the message is signed, specify an array of MEMessageSigner objects to indicate who signed the message. MEMessageSigner includes additional context that the security handler’s view controller uses to display details to the user, such as the certificate a signer used.

To provide the decoded message content to MailKit, create an instance of MEDecodedMessage. The decoded message contains the raw MIME content for the message, and the message security information.