Senderbase Reputation Bad for no reason?

[MaroPostcom]

Does anyone know of any way I can find out WHY some of our IP's poor senderbase reputation score even though the rest that send the same mail do not?

It seems to only be this range of IP's affected as they were a group of 30 that we received...184.107.24.161-190

    I like the concept of what Cisco is doing with senderbase - but without  telling system administrators WHY they are listed poorly, how can we  fix the problem? And why is there no mechanism to contact people to  request the reasoning behind the change in status?

   If anyone can help, please let me know - as we don't know who to contact and I suspect the previous owner of these is the reason for it!

184.107.24.170	mta170.maropost.com	Y	0.0	2.3	0	Poor
184.107.24.174	mta174.maropost.com	Y	0.0	0.92	0	Poor
184.107.24.175	mta175.maropost.com	Y	0.0	0.61	0	Poor
184.107.24.176	mta176.maropost.com	Y	0.0	0.61	0	Poor
184.107.24.189	mta189.maropost.com	Y	0.0	2.2	0	Poor

[Valter Da Costa]

Hi Ross,

Please consider opening a Service Request with our Customer Care ( http://www.cisco.com/web/ironport/contacts.html#~tab-3). We can investigate the SBRS for these IP address and provide further information.

Please note we share the specifics with the IP address or network's administrator as they are the one who can fix the issue. We do not disclose details with any other who is not administrator of the IP address or network to keep the data private about the network in question.

If you are not the admin, please advise your partner/customer to check :

http://www.senderbase.org/contact

I also would like to share this Tecnical Article from our knowledge base:

Article #100: SenderBase: Frequently Asked Questions Link: http://tools.cisco.com/squish/91fE2

It contains valuable information about this topic.

I hope this helps.

Valter