Yesturday, I had changed my public DNS servers for my domain name from
ns1-no-ip.com to ns1.yourhostdns.com
ns2-no-ip.com to ns2.yourhostdns.com
for testing purpose
Then I changed them back to no-ip within 24hours.
This morning mostly all email getting out of my exchange organisation are rejected from many organization (like hotmail, yahoo, private servers) because of spam.
How can I fix that. I did not had this problem before changing my DNS but anyway they are back to the original config.
bay0-mc4-f13.bay0.hotmail.com #550 OU-001 Mail rejected by Windows Live Hotmail for policy reasons. Reasons for rejection may be related to content with spam-like characteristics or IP/domain reputation problems. If you are not an email/network admin please contact your E-mail/Internet Service Provider for help. Email/network admins, please visit http://postmaster.live.com for email delivery information and support ##
osci.qc.ca #591 email@example.com your host [69.70.158.xxx] is blacklisted by sbl-xbl.spamhaus.org. Veuillez envoyer vos question a firstname.lastname@example.org ##