fail2ban-client status plesk-dovecot
Status for the jail: plesk-dovecot
|- Filter
| |- Currently failed: 0
| |- Total failed: 0
| `- File list: /var/log/maillog
`- Actions
|- Currently banned: 0
|- Total banned: 0
`- Banned IP list:
Fail2ban does not catch bad logins anymore. For example over hours attacker try to login with non-existing mail-users.
Product version: Plesk Obsidian 18.0.73.2
OS version: Debian 12.12 x86_64
Build date: 2025/10/03 15:00
Revision: 697b1ead827b8f34242d318faa04cd8e803398a3
As...
Please check on the server in a SSH shell the DNS resolving for letsencrypt domain.
nslookup acme-v02.api.letsencrypt.org
Try to repair:
plesk repair dns
Ubuntu 18 is very old and does not get updates anymore.
https://ubuntu.com/blog/ubuntu-18-04-eol-for-devices
Any no other syslog messages related to dovecot?
1. Set a regular FQDN as hostname in Plesk;
means: If your main domain is thisisa.ork give the server the hostname f.ex. sv1.thisisa.ork
2. Set this FQDN in domain hoster's DNS settings reverse DNS if your server IP
3. Check settings in /etc/resolv.conf and /etc/hostname and /etc/hosts
If...