Dovecot Auth Tries Spam

[Silvio Siefke]

Hello,

i more and more become this messages in logs:

Jul  6 20:43:56 ks3374456 dovecot: auth: Error: passwd-file(jean at proxy.silviosiefke.com,213.130.118.102): stat(/var/vmail/auth.d/proxy.silviosiefke.com/passwd) failed: No such file or directory
Jul  6 21:35:32 ks3374456 dovecot: auth: Error: passwd-file(jennifer at proxy.silviosiefke.com,41.160.109.28): stat(/var/vmail/auth.d/proxy.silviosiefke.com/passwd) failed: No such file or directory
Jul  6 21:35:38 ks3374456 dovecot: auth: Error: passwd-file(jennifer at proxy.silviosiefke.com,41.160.109.28): stat(/var/vmail/auth.d/proxy.silviosiefke.com/passwd) failed: No such file or directory
Jul  6 21:35:44 ks3374456 dovecot: auth: Error: passwd-file(jennifer at proxy.silviosiefke.com,41.160.109.28): stat(/var/vmail/auth.d/proxy.silviosiefke.com/passwd) failed: No such file or directory
Jul  6 22:27:13 ks3374456 dovecot: auth: Error: passwd-file(jack at proxy.silviosiefke.com,203.113.206.105): stat(/var/vmail/auth.d/proxy.silviosiefke.com/passwd) failed: No such file or directory
Jul  6 22:27:20 ks3374456 dovecot: auth: Error: passwd-file(jack at proxy.silviosiefke.com,203.113.206.105): stat(/var/vmail/auth.d/proxy.silviosiefke.com/passwd) failed: No such file or directory
Jul  6 22:27:26 ks3374456 dovecot: auth: Error: passwd-file(jack at proxy.silviosiefke.com,203.113.206.105): stat(/var/vmail/auth.d/proxy.silviosiefke.com/passwd) failed: No such file or directory
Jul  6 22:36:49 ks3374456 dovecot: auth: Error: passwd-file(eric at proxy.silviosiefke.com,41.21.178.38): stat(/var/vmail/auth.d/proxy.silviosiefke.com/passwd) failed: No such file or directory

I understand not, because i have set dovecot so it launched only on my
vpn ips. Give there a way to underbind this tries? I have installed 
fail2ban. Maybe im stupid, because this help not or i has set wrong
entrys. 


<dovecot>
service imap-login {
  inet_listener imap {
  address = 10.8.0.1	
  port = 12520
  }
 
  inet_listener imaps {
  address = 10.8.0.1
  port = 12550
  }
}
</dovecot>

<fail2ban>
[dovecot]
enabled = true
filter  = dovecot
action  = iptables-multiport[name=dovecot, port="pop3,pop3s,imap,imaps,submission,465,sieve", protocol=tcp]
logpath = /var/log/mail.log

[dovecot-auth]
enabled = true
filter  = dovecot
action  = iptables-multiport[name=dovecot-auth, port="12520,12550,submission,465,sieve", protocol=tcp]
logpath = /var/log/mail.log
</fail2ban>

Thanks for help & Nice day
Silvio