error when running ehlo localhost (postmail)

I get this error when running the ehlo localhost command.

HTML:

500 5.5.2 Error: bad syntax

 

Any errors in your mail log? What's the output of

Code:

postcheck

?

 

How do I get that up?

How can I get that to come up? Or were do I look. I am new to the shell and learning. Thanks...

 

error in mail

Is this the commnad? /etc/postfix/main.cf
I ran this from putty as root and get permission denied

 

/etc/postfix/main.cf is a file, not a command. To see what's in it, run

Code:

cat /etc/postfix/main.cf 

postcheck is a command that you can run on the shell. Your mail log is in /var/log/.