The amount of times I’ve run into this today is the worst. At least say what the issue was.
We are investigating. We’ll discuss this situation
Thank you. I’ll notify you as soon as there is a result.
So, we had a conversation regarding this situation.
I agree, it’s not pleasant to see “Solved via PM” at the end of a thread.
Here’s the outcome:
We will make an effort to specify in such posts the exact method used to resolve the issue and the root cause.
Regarding the solution in the thread you referenced:
The mail server added CS to ban list.
It was decided to communicate via PM because the logs contained the portal address.
(original IP has been changed)
In logs, I’ve found that 220.127.116.11 address is banned in fail2ban.log file. As far as I understand this address is related to your portal (https://your.portal.com/)
Please go to the host and check the list of blocked addresses with docker
exec -it onlyoffice-mail-server
iptables -L -n
If you see 18.104.22.168 ip address, try to remove this address from the list.
Example of command to remove address from ban list:
iptables -D f2b-dovecot -s 22.214.171.124 -j REJECT