Is the mail.smtp.from property ignored?

[NicolaIsotta]

According to the specifications (also here):

The mail.smtp.from property can be used to set the SMTP FROM: attribute.

However it seems like the property is ignored. I have configured a session with the property valued, then I'm sending a message this way:

Message message = new MimeMessage(mailSession);
message.setRecipient(Message.RecipientType.TO, new InternetAddress("[email protected]"));
message.setSubject("test");
message.setContent("test", "text/plain");
Transport.send(message);

But the message is rejected because it's missing the FROM.
If instead I do this:

Message message = new MimeMessage(mailSession);
message.setRecipient(Message.RecipientType.TO, new InternetAddress("[email protected]"));
message.setSubject("test");
message.setContent("test", "text/plain");
message.setFrom(new InternetAddress(mailSession.getProperty("mail.smtp.from")));
Transport.send(message);

The FROM is correctly valued.

Is this a bug in the implementation?

[NicolaIsotta]

Created an issue: #137