[Fluotonic]

For information, my jail.local (/etc/fail2ban/jail.local) looks like this:

[pureftpd]

enabled  = true
port     = ftp
filter   = pureftpd
logpath  = /var/log/syslog
maxretry = 3


[dovecot-pop3imap]

enabled = true
filter = dovecot-pop3imap
action = iptables-multiport[name=dovecot-pop3imap, port="pop3,pop3s,imap,imaps", protocol=tcp]
logpath = /var/log/mail.log
maxretry = 5

And when I do this iptables -L -n, I get this...

Chain INPUT (policy ACCEPT)
target     prot opt source               destination         
fail2ban-dovecot-pop3imap  tcp  --  0.0.0.0/0            0.0.0.0/0           multiport dports 110,995,143,993 
fail2ban-ssh  tcp  --  0.0.0.0/0            0.0.0.0/0           multiport dports 22 

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination         

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination         

Chain fail2ban-dovecot-pop3imap (1 references)
target     prot opt source               destination         
RETURN     all  --  0.0.0.0/0            0.0.0.0/0           

Chain fail2ban-ssh (1 references)
target     prot opt source               destination         
RETURN     all  --  0.0.0.0/0            0.0.0.0/0

I hope this is relevant and it will help :-)

Thanks!