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POGetting Invalid Address with javax.mail when the addresses are fine
 

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  1. POGetting Invalid Address with javax.mail when the addresses are fine
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    <p>I'm using the javax.mail system, and having problems with "Invalid Address" exceptions. Here's the basics of the code:</p> <pre><code> // Get system properties Properties props = System.getProperties(); // Setup mail server props.put("mail.smtp.host", m_sending_host); // Get session Session session = Session.getDefaultInstance(props, new Authenticator(){ @Override protected PasswordAuthentication getPasswordAuthentication() { return new PasswordAuthentication(m_sending_user, m_sending_pass); } }); // Define message MimeMessage message = new MimeMessage(session); message.setFrom(new InternetAddress(m_sending_from)); message.addRecipient(Message.RecipientType.TO, new InternetAddress(vcea.get(i).emailaddr)); message.setSubject( replaceEnvVars(subject) ); message.setText(replaceEnvVars(body)); // Send message try { Transport.send(message); } catch (Exception e){ Log.Error("Error sending e-mail to addr (%s): %s", vcea.get(i).emailaddr, e.getLocalizedMessage() ); } </code></pre> <p>The issue is that the above code does work, sometimes. But for some e-mail addresses that I know to be valid (because I can send to them via a standard e-mail client), the above code will throw an "Invalid Address" exception when trying to send.</p> <p>Any clues or hints would be greatly appreciated.</p> <p>--Update: problem with authentication.</p> <p>Ok, here's what I've discovered was going on. When receiving e-mail, the code above correctly sets up authentication and the Authenticator.getPasswordAuthentication() callback is actually invoked.</p> <p>Not so when sending e-mail. You have to do a bit more. Add this:</p> <pre><code> // Setup mail server props.put("mail.smtp.host", m_sending_host); props.put("mail.smtp.auth", "true"); </code></pre> <p>which will force the javax.mail API to do the login authentication. And then use an actual Transport instance instead of the static .send() method:</p> <pre><code> Transport t = session.getTransport(m_sending_protocol); t.connect(m_sending_user, m_sending_pass); </code></pre> <p>...</p> <pre><code> // Send message try { t.sendMessage(message, message.getAllRecipients()); } catch (Exception e){ </code></pre> <p>Without forcing the authentication, the mail server saw me as an unauthorized relay, and just shut me down. The difference between the addresses that "worked" and the addresses that didn't was that the ones that "worked" were all local to the mail server. Therefore, it simply accepted them. But for any non-local "relay" addresses, it would reject the message because my authentication information hadn't been presented by the javax.mail API when I thought it would have.</p> <p>Thanks for the clues to prompt me to look at the mail server side of things as well.</p>
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    1. USSteven M. Cherry
    1. USSteven M. Cherry
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    1. COIt would help to know some examples of the email addresses reported as invalid. Or at least their format.
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      1. USmatt b
    2. COmatt b - what he said!
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      1. USKen Gentle
    3. COPlease give a list of invalid emails.
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      1. USjohnstok
 

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