I have 2 hub server in my exchange organisation.
I have configure 1 send connector in evry hub server to send email to Internet.
This send connector us DNS MX to route email.
I have configure a EHLO fqdn, this fqdn point to public adress used in my firewall.
i have only open smtp port 25 outgoing from my hub server.
Are this configuration is correct?
because now i am blacklisted in ips.backscatterer.org and i have 3 email domain refuse my email en send to my user reject message like this:
554 5.7.1 <n.commail@domai>: Relay access denied,
what i can do to resolve the problem??