Hi all,

All of the ports of the server on which I installed iRedMail have (with the exception of SSH) suddenly and inexplicably closed:

PORT    STATE  SERVICE
22/tcp  open   ssh
80/tcp  closed http
110/tcp closed pop3
143/tcp closed imap
443/tcp closed https
465/tcp closed smtps
587/tcp closed submission
993/tcp closed imaps
995/tcp closed pop3s

The server was processing mail without a problem for a day or two and then suddenly this. I checked if maybe iptables is responsible, but no rules are active.

root@mx:~# iptables -nvL
Chain INPUT (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target     prot opt in     out     source               destination         

Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target     prot opt in     out     source               destination         

Chain OUTPUT (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target     prot opt in     out     source               destination 

Deployed with the downloadable installer on Debian 10 with a Postgresql back-end. The webserver is nginx.

iRedMail edition:
1.0 PGSQL edition.