Index: inetmapi/MAPISMTPTransport.h
--- inetmapi/MAPISMTPTransport.h.orig
+++ inetmapi/MAPISMTPTransport.h
@@ -55,7 +55,7 @@ class MAPISMTPTransport final : public vmime::net::tra
 	bool isConnected() const;
 	void disconnect();
 	void noop();
-	void send(const vmime::mailbox &expeditor, const vmime::mailboxList &recipients, vmime::utility::inputStream &, size_t, vmime::utility::progressListener * = nullptr, const vmime::mailbox &sender = {});
+	void send(const vmime::mailbox &expeditor, const vmime::mailboxList &recipients, vmime::utility::inputStream &, const size_t, vmime::utility::progressListener * = nullptr, const vmime::mailbox &sender = {}, const transport::sendOptions &options = {});
 	bool isSecuredConnection() const { return m_secured; }
 	vmime::shared_ptr<vmime::net::connectionInfos> getConnectionInfos() const { return m_cntInfos; }
 
