STARTTLS works on the ubuntu server but no STARTTLS over internet

Dear Mr. Timme:

I followed your instruction
http://www.howtoforge.com/perfect-server-ubuntu-9.10-ispconfig-3
to have successfully installed Ubuntu 9.10 on Vmware (a Host on Windows
2003). Thanks very much for the detailed instruction.

However, I have the same problem as described here:
http://www.howtoforge.com/forums/archive/index.php/t-24997.html
i.e., Postfix STARTTLS works to localhost only.

FROM MY HOST UBUNTU SERVER:
root@web:telnet web.mysite.com 25
Trying 1**.1**.**.***...
Connected to mail.mysite.com.
Escape character is '^]'.
220 web.mysite.com ESMTP Postfix (Ubuntu)
ehlo mail.mysite.com
250-web.mysite.com
250-PIPELINING
250-SIZE
250-VRFY
250-ETRN
250-STARTTLS
250-AUTH PLAIN LOGIN
250-AUTH=PLAIN LOGIN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN
quit
221 2.0.0 Bye
Connection closed by foreign host.

WE SEE 250-STARTTLS

BUT WHEN I TEST FROM A WINXP OVER INTERNET, I GOT:

220 web.mysite.com ESMTP Postfix (Ubuntu)
ehlo mail.mysite.com
250-web.mysite.com
250-PIPELINING
250-SIZE
250-VRFY
250-ETRN
250-AUTH PLAIN LOGIN
250-AUTH=PLAIN LOGIN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN

NO 250-STARTTLS

THIS END UP WITH THAT THE MAIL I SENT OUT WAS DEFINED AS PBL MISTAKES.

THIS DRIVES ME A LONG TIME! PLEASE GIVE ME AN INSTRUCTION HOW TO FIX IT.

btw, when I follow the Ubuntu doucumentation, https://help.ubuntu.com/9.10/serverguide/C/index.html, I have the samilar problem.

THANKS!

wcz

 

Are you sure that your router forwards port 25 to the correct server?

 

port 25 is open and pointed to the server.

Otherwise, telnet mail.domain.com 25 will not be reachable, I believe.

 

Well, could be possible you have another web server in your LAN that port 25 is forwarded to.

 

only point port 25

to one machine, i.e., this Ubuntu server. Please help.