func encode(_ message: MEMessage, composeContext: MEComposeContext, 
                completionHandler: @escaping (MEMessageEncodingResult) -> Void) {
        // The result of the encoding operation. This object contains
        // the encoded message or an error to indicate what failed.
        guard let rawData = message.rawData else {
            completionHandler(MEMessageEncodingResult(encodedMessage: nil,
                                           signingError: nil,
                                           encryptionError: MEMessageSecurityError(_nsError: NSError(
                                                        domain: MEMessageSecurityErrorDomain,
                                                        code: MEMessageSecurityError.encodingError.rawValue,
                                                        userInfo:[NSLocalizedDescriptionKey:"No Data found.."]))))
            return
        }
        
        if message.subject == "Show Alert",
           let isSendHit = ComposeSessionManager.shared.composeSessionsData[composeContext.contextID.uuidString]?.isSendButtonHit,
           isSendHit == true {
            completionHandler(MEMessageEncodingResult(encodedMessage: nil,
                                           signingError: nil,
                                           encryptionError: MEMessageSecurityError(_nsError: NSError(
                                                        domain: MEMessageSecurityErrorDomain,
                                                        code: MEMessageSecurityError.encodingError.rawValue,
                                                        userInfo:[NSLocalizedDescriptionKey:"Alert: Change Subject Line!!!"]))))
            return
        }
        
        completionHandler(MEMessageEncodingResult(encodedMessage: MEEncodedOutgoingMessage(rawData: rawData, isSigned: false, isEncrypted: false),
                                       signingError: nil, encryptionError: nil))
    }