Hi together,
We're distributing a mailing component in one of our applications. On some systems (we don't know why) the smtp authentication is not working correctly and I can't figure out where the prob is!
I've done the implementation in Java as proposed by so may threads about smtp auth as follows. I've implemented our own Authenticator:
class EcomatAuthenticator extends Authenticator {
private String smtpUser;
private String smtpPass;
public EcomatAuthenticator(final String user, final String pass) {
super();
this.smtpUser = user;
this.smtpPass = pass;
}
public PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(this.smtpUser, this.smtpPass);
}
}
and the props instance contains the neccessary Information:
Properties props = new Properties();
props.put("mail.smtp.host", _smtpHost);
props.put("mail.smtp.auth", "true");
I've to say, that my implementation is working on 90% of the systems sending mail with SMTP auth (they're all sending the mails with our own server, so I can tcpdump the connections for verifying).
As already said, we've many clients working with our software. But there are some users - withing the same company - where the SMTP connection does not perform any AUTH command - although the mail.smtp.auth is set in the props instance.
When I'm doing the message sending from my machine, the smtp log on the server looks this way:
--
220 mail.ourserver.ch ESMTP
EHLO devnull
250-mail.ourserver.ch
250-AUTH LOGIN CRAAUTH LOGIN
334 DFAJDFAIE
djfaFDJkfdsa93jKEFJJF==
334 ADFJ3293DFASD
ASDFJewfakjfasdFASdfi3
235 ok, go ahead (#2.0.0)
MAIL FROM:<info@ourserver.ch>
250 ok
RCPT TO:<anyaddress@hotmail.com>
250 ok
..
..
--
what seems to be quite good. BUT when I'm doing the same stuff on a machine of the customer we've the SMTP log looks like this (it's the same build of our application with the java mail api from april):
--
220 mail.ourserver.ch ESMTP
EHLO PC-M1
250-mail.ourserver.ch
250-AUTH LOGIN CRAMAIL FROM:<info@wilmobil.ch>
250 ok
RCPT TO:<anyuser@hotmail.com>
553 sorry, that domain isn't in my list o
RSET
250 flushed
QUIT
..
--
Now, it's quite clear, that the server rejected the mail in the second smtp log. The question is WHY is the AUTH sequence missing? Both logs were running on the same webserver, with the same JavaMail api and the same smtp (user/password) settings. NO difference.
Has anyone ever had this problem? I'm really confused about this, especially because only one of our customers has this problem. But there doesn't seem to be anny issue with firewall or antivirus software, because smtp on protocol-level seems to work.
I'm confused. Any ideas?
Thanks!!!