Spam Block List Policy
ESN is committed to the goal of elimination of unsolicted email. As a result,
ESN maintains a very strict anti spam policy. As a part of our anti spam
policy, we choose to reject email from some sources.
Third Party Block Lists
ESN utilizes several DNS based RBLs to combat spam. These RBLs may block an
incoming mail based on the sending server IP address, network, host name, sender
domain, or URLs contained in the email. The source, type, and mix of RBLs varies
We trust the judgement of the RBL operators, and we cannot remove your
information from the RBL. If your server, IP or domain is listed in an RBL, we
will not accept mail from your server or domain. If listed, you must contact the
operator of the RBL to get the listing removed, before we will accept mail from
your server or network.
Local Block Lists
ESN also maintains several local block lists. These local block lists may block
an incoming mail based on the sending server IP address, network, host name,
sender domain, or URLs contained in the email. The criteria for being listed in
a local block list varies and evolves over time. But one sure way to get listed,
is to send spam, unsolicited, or unwanted email to our network.
We will not remove a domain, IP, or network from our local block list, when that
request comes from the owner of the blocked domain, IP, or network. We will only
remove a domain or IP from the local block list, if a recipient on our network
requests the removal. In the case of a network block, we may exempt specific IPs
from blocking, but will not remove the network blocking.
We will not whitelist any domain, network, or IP. It is the responsibility of
the owner of the sending server, IP, network, or domain to make sure that their
systems are properly configured, clean, secure, and spam free.
While we may decide to exempt specific IP addresses from network based block
list, we will not whitelist those addresses. Our only action would be to not
actively block those exempted addresses. If those exempted addresses were to
fail some other test or were listed in a third party RBL, email from those
addresses or senders would still be blocked.