CPanel EXIM error – remote_smtp defer (111): Connection refused

02 Oct 2020

Support Center » Knowledgebase » CPanel EXIM error – remote_smtp defer (111): Connection refused

	CPanel EXIM error – remote_smtp defer (111): Connection refused

Solution This happens on some CPanel / WHM servers sending to some destinations due to the SMTP tweak.

While troubleshooting the issue, we found the following:

root@server [~]# iptables -nL

Chain OUTPUT (policy ACCEPT)
target prot opt source destination
ACCEPT tcp -- 0.0.0.0/0 127.0.0.1 tcp dpt:25
REJECT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:25
reject-with icmp-port-unreachable

You have to remove this two iptables rules.

root@server [~]# iptables -D OUTPUT 2
root@server [~]# iptables -D OUTPUT 1

You then have to save iptables and restart.

root@server [~]# /etc/init.d/iptables save
root@server [~]# /etc/init.d/iptables restart

Now, check your mails and you will see all the mails getting delivered as normal.

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10 Jun 2020 03:15 PM

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