HP-UX

In the commercial world we would expect there to be a SMTP relay server between the internal servers and your primary mail server. The primary mail server then has a means to send mail to your ISP.

Is this HP-UX box effectively plugged directly into the Internet and trying to connect directly to your ISP?

HP-UX box is attached to a local network.
Through a local network I have access to the SMTP server. SMTP server sends mail to other networks. SMTP server requires authentication and I can not change that. I have a username and password but do not know how to enter them into sendmail config. I want to be able to send messages from the console using a script. As mentioned earlier, I tried to configure mailx but without success.
Best regards.

Sorry, I don't know how to configure sendmail to do this. This does not necessarily mean that it is impossible, but it will need a specialist with a long memory because of the vintage of that HP-UX (support ended in 2003).

Not even sure whether the sendmail configuration build directories were shipped with HP-UX 10.20 .

Ok, thank you for your time.
I will try to find another solution.
Maybe I can compile the Heirloom mailx or something similar.
I need to install the necessary software, because at this point I can not compile anything. (gcc, etc.)
Best Regards.

Sorry, but I have absolutely no idea what this post means in this context. Others may know.

From http://heirloom.sourceforge.net/mailx.html:

"Supports SMTP to send messages directly to a remote server.(...) SMTP AUTH is also supported."

Just exactly what I needed.
Best Regards.