Manuel Mely:
> Do you have a monitoring tool in your network? Maybe it's a Nagios testing
> your smtp server.
> That also happens to me in my loadbalancer, keepalived test smtp port
> with a telnet and then disconnects and i have a lot of this message in
> my logs too.
>
> Is there a way to avoid this?
The fix is to configure the tool to send QUIT<CR><LF> before hanging
up.
The "lost connection after connect from unknown[unknown]" requires
attention when it happens frequently; it means that traffic exceeds
the server capacity.
Wietse
> PS: It's not for spam.
>
>
