About my setup. Only one Server runs Windows 2000 Adv Server, MS DNS, IIS(web/ftp), MS SMTP(iis). I do not have any other email server software installed.
The error message: Message delivery to the remote domain 'yahoo.com' failed for the following reason: The remote server did not respond to a connection attempt.
This happens on all domains with all email, not just Yahoo.com.
I have tested DNS at www.DNSReport.com
and it seems to be fine. I can do NSLookups and they seem to be fine as well.
This same server has worked for about a year solid now. No other software has been recently installed. All the correct ports are open. I can also telnet into port 25 and send HELO.
WHen i telnet in and try to send an email from postmaster@mydomain, i get sender ok.
Then when i say RCPT TO: email@example.com it says 'Unable to relay'.
Thanks in advance experts.