I have one Linux box (=SERVER) running Fedora Core 3 with an installed and working sendmail on it. The SERVER is directly connected to the Internet via leased line. For security reasons I am using IPTables on that SERVER.
The SERVER is able to send an receive e-mail.
To be able to send mails from a client (=CLIENT) at home (A Windows 2003 Server) via that Linux box, I have installed SMTP-Auth on the SERVER to avoid to have an open relay.
I am able to use the SERVER as an SMTP server via Outlook with authentication activated on my CLIENT.
I am running a Lotus Notes Server on the CLIENT, but SMTP Auth. functionality is not implemented into Lotus Notes. So I installed MercuryC SMTP Client on the CLIENT.
But I am not able to connect to the SERVER using the SMTP Auth user/password.
Then I tried to telent the SERVER from my CLIENT. On the Windows Server 2003 CLIENT I have entered
>telnet my.server.com 25
But all i got was: "Connection Refused". Doing that local on my SERVER is no problem, there I can connect to SMTP Port 25 and do a HELO or EHLO.
I tried to telent my SERVER from different clients (Windows XP and Windows 2003 Server), and I found out that a telnet from a Sun Solaris is working and takes me to SMTP Login...
Q1) Why is telnet working from a Sun Solaris box and NOT from Windows
Q2) What can I do to get Mercury talking to my Server
Any help would be appreciated!