The address of the sender of the message.
def get_message_sender() -> str: ...
message_sender = property(get_message_sender, None)
This property contains the address of the sender of the message. Which is normally the same value as message_from.
There are cases when a message may have more than one sender. If this is the case, the addresses are provided in the message_sender property separated by commas.
This property is read-only.