Le 16/12/2013 22:05, (lists) Denis BUCHER a écrit : > Dear all, > > I have a very strange problem with our postfix server. It has been > working for years without problem, but suddenly we started to have > errors with SMTP connexions from outside. > > On the client side (we tested with Thunderbird and Outlook), the > connection lasts many minutes before showing a timeout error. > > On the server side, the logs are always the same : > > * Dec 16 21:42:33 svrmail postfix/smtpd[8531]: connect from > x-x.195-178.cust.bluewin.ch[178.195.x.x] > * Dec 16 21:44:41 svrmail postfix/smtpd[8531]: lost connection after > UNKNOWN from x-x.195-178.cust.bluewin.ch[178.195.x.x] > * Dec 16 21:44:41 svrmail postfix/smtpd[8531]: disconnect from > x-x.195-178.cust.bluewin.ch[178.195.x.x] > > But the most strange point is that if I do "telnet ip_of_server 465" I > am immediately connected, and can use normal SMTP commands. > > The configuration that used to work was : > > * Port 465 > * SSL/TLS > * Authentication : password > > Does someone has an idea about what could be the cause of such a > strange problem ? > > Does it has something to do with SSL/TLS ? > > Really, any help or advice wi > > Denis > > > > >
Are you sure your clients connect directly to postfix ? No proxy, no anti-virus that could hijack the connection and behave incorrectly with SSL/TLS ?
