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JavaMail - keeping session alive

When emailing using this java code,

Session session = Session.getInstance(props, new MyAuthenticator(username, password));
.... settings
tr = session.getTransport("smtp");
tr.send(msg);

after some period of inactivity, I get this error

550-currently not permitted to relay through this server. Perhaps you have not
550-logged into the pop/imap server in the last 30 minutes or do not have SMTP
550 Authentication turned on in your email client.

I I run an email client, (i.e., Evolution) which check email every 10 minutes, my code always works. But this does not seem like a clean solution. How do I keep my session alive?

Thank you,
Mark

SOLUTION

CEHJ

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CEHJ

You can of course implement that with a Timer. You'd then have something like this in your send method:

if (needNewSession) {
getNewSession();
}
// Carry on with sending

kerzner

ASKER

But I always get new session!.

I mean, I am not using this old connection; every time I need to send an email, I execute this code above. So it is always a new connection, or should be.

Nevertheless, every mail client beats me. I had this error in windows, and now I am having it in Linux. What does mail client to different from me?

kerzner

ASKER

I saw a similar question on the Ruby forum and the solution was

Net::SMTP.start('localhost', 25, 'localhost.localdomain', 'mickey', 'cheese', :login) do |smtp|

how do you do the same thing in java? In other words, how do you login rather than grab an already existing session?

ASKER CERTIFIED SOLUTION

CEHJ

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CEHJ

:-)