Client was not authenticated to send anonymous mail during MAIL FROM (in reply to MAIL FROM comm

UNIX for Advanced & Expert Users
1

I am having trouble getting mail to work on a red hat server. At first I was getting this message.

Diagnostic-Code: X-Postfix; delivery temporarily suspended: connect to [ip address]:25: Connection refused

Then added the port to my firewall. Then I temporarily turned off selinux. I then copied this file from a working server.

/etc/postfix/main.cf

I did this to get postfix to reload.

postfix reload
postfix -f

No matter what I try now I get this message. What am I doing wrong?

Client was not authenticated to send anonymous mail during
    MAIL FROM (in reply to MAIL FROM command)
2

Is the SMTP port 25/TLS ?

You have not provided enough information to debug from here; but normally these problems are related to the configuration of the MX host .