Suppose you have done all tries , like exim reset , make sure 25 port open and csf port block off. Still your email sending is off in your server.
Then surely you have to look at your iptables and make sure reload and restart it and hope that will solve your problems.
Easiest way is to reboot (also if below does not work, reboot, check if that made the change).
Second easiest is to restart the daemons using iptables configurations (google: restart daemon ubuntu).
examples (depends your configuration):
/etc/init.d/iptables restart
/etc/init.d/networking restart
/etc/init.d/firewall restart
sudo /etc/init.d/firewall restart
You can "disable" (or stop) the firewall by setting the default policies on all standard chains to "ACCEPT", and flushing the rules.
Then surely you have to look at your iptables and make sure reload and restart it and hope that will solve your problems.
Easiest way is to reboot (also if below does not work, reboot, check if that made the change).
Second easiest is to restart the daemons using iptables configurations (google: restart daemon ubuntu).
examples (depends your configuration):
/etc/init.d/iptables restart
/etc/init.d/networking restart
/etc/init.d/firewall restart
sudo /etc/init.d/firewall restart
You can "disable" (or stop) the firewall by setting the default policies on all standard chains to "ACCEPT", and flushing the rules.
iptables -P INPUT ACCEPT
iptables -P OUTPUT ACCEPT
iptables -P FORWARD ACCEPT
iptables -F
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