This is a private list of class C networks which are assigned to domains and/or ISPs that have sent messages which we consider to be UCE/SPAM. It is based on our sendmail logs and local user reports. When a message is received, we review the entire network and make a decision on listing. Generally we keep the name of the domain which sparked the addition.
There are currently 6981 networks on this list.
You can find out if a net is on the list:
We do not add networks to this list lightly and so there has to be a significant reason for us to consider removal of the entire network. The first best way is to have the entity responsible for the network to clean house, removing the spam sources, etc. Changing the DNS to reflect the removal of these clients will be helpful.
If we've made an error in assessing the network or there are extenuating circumstances we should consider, please send an email to us at dnsbl at invlogic.com and provide any necessary details (the Class C address, why it isn't appropriately listed). We will consider each request on a case by case basis and let you know the results. Again, the simplest method is publishing appropriate SPF records.
The easiest means to get your message delivered is to publish SPF records for the domain. Our systems are configured to overlook the DNSBLs if the host is the legitimate sender for the given domain. Abuse of this (publishing +all records or sending spam via an authorized host) will result in the domain being added to our SPF DENY list, blocking it permanently.
As a last resort, we have created a special address that will allow you to send a message in spite of the above source and content filtering. By sending your message to:
bypass+<user>#<domain> at invlogic.comwhere <user>#<domain> is the original address with the @ replaced by a #. For example:
bypass+access#linux.org at invlogic.com
Initially, someone here will review the message and pass it along to the recipient, eventually it may become more automatic. I would not recommend sending anything you're not comfortable having someone, besides the intended recipient, reading. This will only work for domains which we are locally responsible for, it isn't a generic forwarder. We reserve the right to permanently block anyone who abuses this feature.
For the complete story on how we handle email, click here.
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