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Re: JavaMail bug?

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On 16/08/11 22:06, Martin Gregorie wrote:
> On Wed, 03 Aug 2011 09:38:41 +0100, Nigel Wade wrote:
>
>> I've just been reviewing the JavaMail API as it's a while since I used
>> it. You need to be aware that Transport.send() is a /static/ method. I
>> presume this means it takes no note of any connection established by an
>> object of class Transport, since the class method has no knowledge of
>> any contents of any Transport object. That probably explains why it uses
>> the values in the Session, not those established by the Transport object
>> you've created.
>>
> Final comment:
>
> On Sunday this whole mess niggled me again, so I ripped out the property
> setting the default MTAname and replaced the call of tr.send(msg) with
> tr.sendMessage(msg, recipients) so the Transport acquired from the
> Session is used. This all works as expected: there's only the one EHLO
> conversation and the recipient is validated (which I don't remember
> seeing earlier).
>
>

Yes, I think that's the best way to do authentication. If you look at 
the top of the Javadocs for com.sun.mail.smtp (the protocol which is 
actually used behind the scenes, it's not exactly obvious because the 
design hides this from you) it states:

To use SMTP authentication you'll need to set the mail.smtp.auth 
property (see below) or provide the SMTP Transport with a username and 
password when connecting to the SMTP server. You can do this using one 
of the following approaches:

     * Provide an Authenticator object when creating your mail Session 
and provide the username and password information during the 
Authenticator callback.

       Note that the mail.smtp.user property can be set to provide a 
default username for the callback, but the password will still need to 
be supplied explicitly.

       This approach allows you to use the static Transport send method 
to send messages.

     * Call the Transport connect method explicitly with username and 
password arguments.

       This approach requires you to explicitly manage a Transport 
object and use the Transport sendMessage method to send the message. The 
transport.java demo program demonstrates how to manage a Transport 
object. The following is roughly equivalent to the static Transport send 
method, but supplies the needed username and password:

           Transport tr = session.getTransport("smtp");
           tr.connect(smtphost, username, password);
           msg.saveChanges();      // don't forget this
           tr.sendMessage(msg, msg.getAllRecipients());
           tr.close();



-- 
Nigel Wade

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Re: JavaMail bug? Martin Gregorie <martin@address-in-sig.invalid> - 2011-07-29 21:32 +0000
  Re: JavaMail bug? Knute Johnson <september@knutejohnson.com> - 2011-07-29 16:26 -0700
  Re: JavaMail bug? Nigel Wade <nmw-news@ion.le.ac.uk> - 2011-08-01 13:20 +0100
    Re: JavaMail bug? Martin Gregorie <martin@address-in-sig.invalid> - 2011-08-01 21:49 +0000
      Re: JavaMail bug? Nigel Wade <nmw-news@ion.le.ac.uk> - 2011-08-02 16:34 +0100
        Re: JavaMail bug? Martin Gregorie <martin@address-in-sig.invalid> - 2011-08-02 20:01 +0000
          Re: JavaMail bug? Nigel Wade <nmw-news@ion.le.ac.uk> - 2011-08-03 09:27 +0100
            Re: JavaMail bug? Martin Gregorie <martin@address-in-sig.invalid> - 2011-08-08 22:50 +0000
              Re: JavaMail bug? Nigel Wade <nmw-news@ion.le.ac.uk> - 2011-08-09 13:31 +0100
                Re: JavaMail bug? Martin Gregorie <martin@address-in-sig.invalid> - 2011-08-09 22:47 +0000
                Re: JavaMail bug? Nigel Wade <nmw-news@ion.le.ac.uk> - 2011-08-10 09:34 +0100
                Re: JavaMail bug? Martin Gregorie <martin@address-in-sig.invalid> - 2011-08-10 19:37 +0000
          Re: JavaMail bug? Nigel Wade <nmw-news@ion.le.ac.uk> - 2011-08-03 09:38 +0100
            Re: JavaMail bug? Martin Gregorie <martin@address-in-sig.invalid> - 2011-08-16 21:06 +0000
              Re: JavaMail bug? Nigel Wade <nmw-news@ion.le.ac.uk> - 2011-08-17 10:29 +0100
                Re: JavaMail bug? Martin Gregorie <martin@address-in-sig.invalid> - 2011-08-17 19:54 +0000
                Re: JavaMail bug? Nigel Wade <nmw-news@ion.le.ac.uk> - 2011-08-18 09:34 +0100
                Re: JavaMail bug? Martin Gregorie <martin@address-in-sig.invalid> - 2011-08-18 19:50 +0000
  Re: JavaMail bug? Andreas Leitgeb <avl@gamma.logic.tuwien.ac.at> - 2011-08-01 12:54 +0000

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