iRedMail-0.8.7 :: I can not send or receive email

Hello port 25 was blocked by your firewall. please use this code with putty or ssh after connect to your server

UBUNTU AND DEBIAN :

ufw allow smtp
ufw allow submission
ufw allow imaps 

Or

iptables -A OUTPUT -p tcp --sport 25 -j ACCEPT
iptables -A OUTPUT -p tcp --sport 587 -j ACCEPT

Centos and fedora

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iptables -A INPUT -m state --state NEW -p tcp --dport 25 -j ACCEPT

/sbin/service iptables save
/sbin/service iptables restart

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Thank you Mirandanico, but i have this erro:

Rules updated
Rules updated (v6)
root@endeavour:/etc/default# ufw allow submission
Rules updated
Rules updated (v6)
root@endeavour:/etc/default# ufw allow imaps
Rules updated
Rules updated (v6)
root@endeavour:/etc/default# service iptables restart
[ ok ] Flushing firewall rules: iptables.
[ ok ] Setting chains to policy ACCEPT: filter.
[FAILding iptables modules failed!
[ ok ] Applying iptables firewall rules:.
root@endeavour:/etc/default#```

As you can see, the load of IPTABLES MODULES failure.

Can you help me again?

Thank you.

Are you able to access port 25 on remote servers? Run:

nc -vz smtp.gmail.com 25

If it does not output Connection to smtp.gmail.com 25 port [tcp/smtp] succeeded!, it means that SMTP is blocked on your droplet. In that case, please open a support ticket so that the team can unblock SMTP traffic. Thanks!