Email Server Errors

Discussion in 'Server Operation' started by giganet, Apr 8, 2008.

  1. giganet

    giganet New Member

    Hello group

    Am running Ubuntu 7.10 on my primary Email server with: Postfix With SMTP-AUTH And TLS

    All has worked flawlessly for 8 months...

    What I am experiencing is the following errors at random times, this error is being generated on a desktop PC running WIN XP utilizng OE as a Email client.:
    Your server has unexpectedly terminated the connection. Possible causes for this include server problems, network problems, or a long period of inactivity. Account: '', Server: '', Protocol: POP3, Port: 110, Secure(SSL): No, Error Number: 0x800CCC0F

    I have found that from time to time services such as pop3 and ftp will need to be restarted, I use the MikroTik Dude to watch my network hardware with.

    Commands I have to use at times are:
    /etc/init.d/courier-pop restart
    /etc/init.d/courier-imap restart
    /etc/init.d/proftpd restart

    These only provide short releif from the errror ocurring again though.
    I have also tried to reboot the server but the error still persist.

    What would possibly cause this error?

    Thanking you in advance for your help...

  2. Ben

    Ben ISPConfig Developer ISPConfig Developer

    What does your own mailserver show in the /var/log/mail.* Files?
  3. giganet

    giganet New Member

    Thank you for the reply Ben

    Took a look into /var/log.

    In mail.err I see the following errors ocurring since the 6th of April:
    Apr  8 08:42:48 giganetwireless courierpop3login: Maximum connection limit reached for ::ffff:
    Apr  8 08:43:19 giganetwireless last message repeated 10 times
    Thanks for your help

  4. falko

    falko Super Moderator ISPConfig Developer

    Is your IP address? Or is it maybe a hacker trying to log in again and again? In the latter case you could block that IP address.
  5. giganet

    giganet New Member

    Thank you...

    The IP is the wireless client back-end appliance which controls AAA, IPS, etc, for my WISP system.

    This is the address which all users will appear to be coming from when they do anything Online.

    This appliance will only utilize the Email server when it is alerting the admin of issues or when the admin chooses to Email the clients at any time required.

  6. falko

    falko Super Moderator ISPConfig Developer

    Not sure if there's a connection limit somewhere in the Courier configuration. Did you check Courier's configuration files?
  7. giganet

    giganet New Member

    Thank you Falko

    I am unsure of which file actually is the courier config file?

    I have been looking in the file "pop3d" located in the dir '/etc/courier' and have located the following setting
    which I have question of whether I should try allowing MAXPERIP=20
    For the last couple of days I must restart pop3 every hour or two...

    Or is there another file I should be looking in to alter settings through?

    Thanks allot Falko

  8. falko

    falko Super Moderator ISPConfig Developer

    I think you should check all config files in the /etc/courier directory.

    I'd try it to see if it makes a change.

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