[Tickets #7388] SMTP AUTH failure when accepting Kronolith invitation

[bugs at horde.org]

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Ticket URL: http://bugs.horde.org/ticket/7388
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  Ticket             | 7388
  Created By         | arjen+horde at de-korte.org
  Summary            | SMTP AUTH failure when accepting Kronolith invitation
  Queue              | IMP
  Version            | 4.2
  Type               | Bug
  State              | Unconfirmed
  Priority           | 1. Low
  Milestone          |
  Patch              |
  Owners             |
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arjen+horde at de-korte.org (2008-09-24 13:32) wrote:

I have configured Horde to use SMTP AUTH for submitting messages  
through 'config/conf.php':

     $conf['mailer']['params']['port'] = 587;
     $conf['mailer']['params']['auth'] = true;
     $conf['mailer']['type'] = 'smtp';

This works just fine when writing new messages or sending replies:

Sep 24 16:37:57 mail postfix/smtpd[19746]: connect from localhost[127.0.0.1]
Sep 24 16:37:57 mail postfix/smtpd[19746]: setting up TLS connection  
from localhost[127.0.0.1]
Sep 24 16:37:58 mail postfix/smtpd[19746]: Anonymous TLS connection  
established from localhost[127.0.0.1]: TLSv1 with cipher DHE-RSA-AES256
Sep 24 16:37:58 mail postfix/smtpd[19746]: 49B7A6041C:  
client=localhost[127.0.0.1], sasl_method=LOGIN,  
sasl_username=user at example.com
Sep 24 16:37:58 mail postfix/smtpd[19746]: disconnect from  
localhost[127.0.0.1]

The exception to this rule is, when I want to accept/deny an  
invitation that was send through Kronolith. After hitting the 'Go'  
button, the following error message appears:

"authentication failure [SMTP: Invalid response code received from  
server (code: 535, response: 5.7.8 Error: authentication failed:  
generic failure)]."

In the mailserver logs is logged at the same time:

Sep 24 19:09:28 mail postfix/smtpd[21873]: connect from localhost[127.0.0.1]
Sep 24 19:09:28 mail postfix/smtpd[21873]: setting up TLS connection  
from localhost[127.0.0.1]
Sep 24 19:09:29 mail postfix/smtpd[21873]: Anonymous TLS connection  
established from localhost[127.0.0.1]: TLSv1 with cipher DHE-RSA-AES256
Sep 24 19:09:29 mail postfix/smtpd[21873]: warning: SASL  
authentication failure: All-whitespace username.
Sep 24 19:09:29 mail postfix/smtpd[21873]: warning:  
localhost[127.0.0.1]: SASL LOGIN authentication failed: generic failure
Sep 24 19:09:29 mail postfix/smtpd[21873]: disconnect from  
localhost[127.0.0.1]

Accepting messages works just fine when I use the build in sendmail  
binary, but not when the replies go through SMTP AUTH. I would like to  
use SMTP AUTH, so that I don't have to duplicate the existing  
'smtpd_sender_login_maps' that prevent From address spoofing.