If you have any questions regarding a blacklisting or non delivered mails, please contact the provider of the recipient,
This publicly available DNS blacklist is permanently regenerated by the NiX Spam project of the German IT magazine iX. It contains IP addresses of spam senders and hash values (fuzzy checksums) of incoming spam. The blacklist can be used to protect mailservers against spam. But checking a single DNSBL should not be the only criterion for spam.
There are two ways to remove the IP address immediately:
Manuel Schmitt, technical contact for the dns-based version ix.dnsbl.manitu.net and CEO of manitu
Bert Ungerer, http://www.heise.de/ix/Impressum-5541.html
These partners support the blacklist.
There are currently 79,356 entries listed at the dns-zone ix.dnsbl.manitu.net which have been collected during the last 12 hours (+144 within the last 5 minutes).