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Probably too many failed log in attempts. I have it happen with users all the time - they call me and say they've only fat-fingered their password once or twice. But the server is not set to block until after five failed attempts. After the time-out period, mail starts flowing again.
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<br />And in our case - that failed Login Manager block can stop ALL mail to the BX server, not just one user. That's because everything flowing to our BX servers goes through a CanIt Domain Pro SPAM filtering server. When CanIt is not sure if its SPAM or HAM - it holds the message for human review and sends a notice to the user to log in and check the message.
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<br />But there are not logins for every user on the CanIt server (thousands of users). They login to CanIt with their end server's username & password. The server sends that to their BlueOnyx server in a POP connection. If the BX server lets them in - CanIt lets them into CanIt to perform the human review of what messages are in the traps. So if someone makes a BUNCH of failed login attempts to CanIt - the BlueOnyx Login Manager blocks that IP (the CanIt server), and all e-mail comes to a screeching halt. Once the timeout lifts the IP block - mail starts again on its own. But what PIA!
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<br />If it happens again Lewis - check for blocks in the SERVER MANAGEMENT, SECURITY, and FAILED LOGINS. I'd suggest clicking the "Reset all blocks" button, and see if mail starts again.
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<br />
<br />Chuck
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<br /><font size="2"><b>---------- Original Message
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From: Lewis Gardner <lewisg@iglou.com>
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To: BlueOnyx General Mailing List <blueonyx@mail.blueonyx.it>
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Sent: Sat, 03 Dec 2016 09:58:57 -0500
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Subject: [BlueOnyx:20326] Re: Authentication failed
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Sorry for not updating this post.
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I tried unclicking Enable SMTP Server, Enable SMTP Auth and Enable POP
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Server (for good measure) then saved in the GUI. Waited a few minutes
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and reclicked those three and saved. No joy.
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About two hours later email resumed without further action on my part.
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Did making those changes in the GUI restart dovecot?
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Thanks!
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Michael Stauber wrote:
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> Hi Lewis,
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>
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>> Did something change?
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>>
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>> When trying to get email via POP I'm getting;
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>>
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>> "Sending of password did not succeed. Mail server xxxx.xxx
responded:
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>> Authentication failed."
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>
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> Nope, there were no updates which could have caused this. Perhaps
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> dovecot-auth has hung up after a brute force attack?
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>
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> Try to stop dovecot. Then check the process list and kill off anything
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> related to dovecot that' still running. Then restart the service and see
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> if it works. It usually does.
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>
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<br />>
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<br />>
<a target="_blank" href="http://mail.blueonyx.it/mailman/listinfo/blueonyx">http://mail.blueonyx.it/mailman/listinfo/blueonyx</a>
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