btw.. there is an [iter_attachments](https://docs.python.org/3/library/email.message.html#email.message.EmailMessage.iter_attachments) method but this apparently does not work correctly so I made a Mail class that iterates through all assets and checks if it is really a valid attachment. I hope I can change this in the future.
[ Full content available at: https://github.com/apache/incubator-airflow/pull/3661 ] This message was relayed via gitbox.apache.org for devnull@infra.apache.org
