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Pop3 prompting password

Discussion in 'E-mail Discussions' started by TheDarkMist, Jul 11, 2012.

  1. TheDarkMist

    TheDarkMist Registered

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    Hello,
    some of our clients are experiencing randomly the username e password prompt in their pop3 clients. They obiviously have the credential saved, but in the server logs we can effectively see the failed logins. But it's strange, since after few minutes it restart working. I'm wondering how we can investigate le causes of that. We have spamassassin enabled, if this matters something.
    Some ideas?
    Kind regards...
     
  2. TheDarkMist

    TheDarkMist Registered

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    Hello. Noone experienced similar problems with dovecot? We set the server limits to those values (our server hosts about 100 accounts):

    Number of Spare Authentication Processes: 10
    Maximum Number of Authentication Processes: 250
    Maximum Size of a Authentication Process (MB): 128
    Size of Authentication Cache (KB): 2048
    Maximum IMAP Connections per IP: 50
    Maximum POP3 Connections per IP: 50
     
  3. Eric

    Eric Administrator
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    Howdy,

    We would be happy to help you out this this but we need to login to the server. I recommend you submit a ticket.

    Thanks!
     
  4. cPanelTristan

    cPanelTristan Quality Assurance Analyst
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    Of note, when you are troubleshooting this type of issue, it is best to check the number of connections currently running for dovecot during the times you are seeing these failed logins:

    Code:
    ps aux | grep dovecot
    If the connections are above your threshold, there's the issue right there. You should be able to see in the process list who has the most processes at the time and might be causing the issue.

    Otherwise, you might also check netstat for dovecot to see if someone is hitting the service but not logging into it, causing a denial of service attack:

    Code:
    netstat -anp | grep dovecot
     
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