On 19 Nov 2015, at 22:04, onlineuser <onlineuser@???> wrote: > I have following problem:
>
> 2015-11-19 11:59:06 SMTP protocol synchronization error (input sent without waiting for greeting): rejected connection from H=xxx [w.x.y.z] input="quit\r\n"
>
> root@host:~# telnet w.x.y.z 25
> Trying w.x.y.z...
> Connected to w.x.y.z.
> Escape character is '^]'.
> quit
> 554 SMTP synchronization error
> Connection closed by foreign host.
You didn't wait for the banner before typing 'QUIT'.
Clients must wait for the server to return a banner before making any input.
