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  1. #1
    Join Date
    Jan 2008
    Location
    Sacramento, CA
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    3,649

    SMTP Error "(-1):" Authentication failed with Roundcube

    I have a few clients getting the following error when attempting to send email with roundcube: SMTP Error "(-1):" Authentication failed

    If they click the send button a few times it eventually goes through, but I can't find what's causing this error to fix it.

    Anyone else come across this error or now how to handle it.

    It's on a DirectAdmin server.
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  2. #2
    Join Date
    Mar 2009
    Location
    Austin, TX
    Posts
    934
    Anything interesting from /var/log/mail.log and /var/log/exim/*?
    SysAdmin.xyz
    Having severs with customer data on it without proper monitoring is like having one night stand without using protections - eventually, there will be an 'oh s**t!' moment.

  3. #3
    Join Date
    Jan 2008
    Location
    Sacramento, CA
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    3,649
    Not it says user unknown in the logs, but then it let's it go through a second or two later if you hit the send button again.

    I'm not sure what's causing this, and I've been working on it for two days. I've searched directadmin forums, roundcube forums, and google and have found nothing so far. Usually I'm able to find something to help me fix it.
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  4. #4
    Join Date
    Jan 2008
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    Sacramento, CA
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    btw, were running version 0.3.1
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  5. #5
    Join Date
    Mar 2009
    Location
    Austin, TX
    Posts
    934
    Not too familiar with Exim. From the looks of it it may be have some connection throttling going on(?). I'm probably wrong about it.

    For example, Postfix have "anvil" to protect against light DoS/SYN attacks.

    It only happens with roundcube? How about SquirrelMail? How about clients like Thunderbird?
    SysAdmin.xyz
    Having severs with customer data on it without proper monitoring is like having one night stand without using protections - eventually, there will be an 'oh s**t!' moment.

  6. #6
    Make sure in the config file you have set the port 25 or 587. If you are set 25 then try replacing it with 587 and vice versa and try to check if this fix your problem.
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  7. #7
    Join Date
    Oct 2003
    Location
    Hanoi
    Posts
    4,306
    Check if their identities are still existed or not?

  8. #8
    Join Date
    Jan 2008
    Location
    Sacramento, CA
    Posts
    3,649
    The weird thing is that nothing has changed, and it all of a sudden started happening. Yes, all of the users exist because it also occurs with my email addresses (though I don't usually use roundcube to access mail; I access it via a desktop app).
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  9. #9
    Join Date
    Jan 2008
    Location
    Sacramento, CA
    Posts
    3,649
    I think I may have inadvertently discovered the issue.

    We tried to upgrade to PHP 5.2.3 a couple of weeks ago, but it caused too many issues on our server so we downgraded to 5.2.11. Didn't realize it, but the issues with roundcube seemed to start about the same time.

    We were then running into 503 issues with litespeed and couldn't figure out what the issue was because it was only random websites.

    Anyway, we downgraded to 5.2.9 (5.2.10 has known bugs) and that fixed the 503 problem as well as the roundcube problem. We still need to do some more testing on the roundcube issue, but it looks like it's been fixed.

    The error in roundcube gave NO clue as to the real problem and it stumped both myself and my system admin for days.
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