My email server has been listed at CBL (Composite Blocking List) due to an improper HELO response. My outbound IP Address resolves to mail.mydomain.com at our authoritative DNS. When certain servers do an EHLO/HELO check for spamming, my email server returns servername.domainname.local (my internal domain name). How can I get my Exchange Server 2003 to respond with my DNS listing of mail.domain.com??
- Open ESM drill down to
- Administrative groups
- Your server
- Virtual Server, Properties
Deliver, and Advance, under Full qualified domain name, (VSEX1.smtp25.org) replace the entry with your public host record of your mail server FQDN (mail.smtp25.org), click Check DNS to make sure it is valid.
Stop and restart your Exchange Virtual server, now if you telnet into your server on port 25 you will get SMTP banner as mail.smtp25.org