Please whitelist cPanel in your adblocker so that you’re able to see our version release promotions, thanks!

The Community Forums

Interact with an entire community of cPanel & WHM users!

Unable to connect to port 25

Discussion in 'E-mail Discussion' started by chris0147, Apr 30, 2017.

  1. chris0147

    chris0147 Well-Known Member

    Aug 28, 2015
    Likes Received:
    Trophy Points:
    cPanel Access Level:
    Root Administrator
    Hi all,

    I have received the emails from cPanel notification alert as the exim has been failed.

    Number of Restart Attempts: 816
    Reason: Unable to connect to port 25 on Connection refused: Died
    The chkservd process attempts to connect to “” in order to validate that this service is functioning. If you blocked connections with iptables or the “Host Access Control” interface in WHM, this failure may be a false positive.
    To resolve this issue, either open the firewall to allow connections as the root user to “” or disable checks for this service in WHM’s “Service Manager” interface with the “Configure Monitor Settings” link below.
    Configure Monitor Settings:
    Configure chkservd:
    I have been checked with tailwatchd and the exim is working fine as they has not been down.

    There is something have to do with the firewall, iptables or Host Access Control which I am not really sure what I need to do.

    Can you please advice me with what I have to do?

    If you can give me the step to step with what I have to do, I will be very grateful.

    Thanks in advance
    #1 chris0147, Apr 30, 2017
    Last edited by a moderator: May 1, 2017
  2. cPanelMichael

    cPanelMichael Technical Support Community Manager Staff Member

    Apr 11, 2011
    Likes Received:
    Trophy Points:
    cPanel Access Level:
    Root Administrator

    Are you using any firewall management utilities such as CSF on this system? Or, do you have any custom iptables firewall rules configured? If not, and if no rules exist via "WHM >> Host Access Control", then I recommend reaching out to your data center or hosting provider to verify if there's anything filtering port 25 in their network or firewall rules.

    Thank you.
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice