According https://www.simplejavamail.org/features.html#section-sent-id it is possible to receive the generated messageId by: ``` mailer.sendMail(email); // id updated during sending! email.getId(); // <1420232606.6.1509560747190@Cypher>` ``` **But how is it possible to receive the messageId when using `.async()`?** When using `.async()`, the `email.getId();` is `null`. Thank you!