Sthu Pous a écrit : > Thank You for Your time and answer, Wietse: > >> Another possiblity is anti-virus software on the sending machine. > > I use Linux Debian squeeze/sid - AFAIK I have no any antivirus software.
whatever you use, you have something that breaks ESMTP, and in particular STARTTLS. This may be - sofwtare (anti-virus, filtering proxy, ...) running on the client machine and intercepting smtp traffic - software (anti-virus, filtering proxy, ...) running on the server machine and intercepting smtp traffic - hardware/software (firewall, router, ...) running between the client and the server and intercepting smtp traffic and please remove the smtpd_banner = The eMail Service because it is invalid. The banner must contain the hostname... etc. on the postfix bow, run the following command openssl s_client -starttls smtp -connect 127.0.0.1:25 (type QUIT to end the connection). then on your client machine openssl s_client -starttls smtp -connect 192.168.1.2:25 where 192.168.1.2 is the IP of your postfix box.
