| “Dark Traffic” which currently represents up to two thirds of all inbound port 25 traffic, is comprised of a combination of Spam. Spam precursors like directory harvest attacks (DHA), email denial of service (DoS) attacks, malformed SMTP packets, invalid recipient addresses, and other requests and communications unrelated to the delivery of valid email messages.
Nexlinx email hygiene solutions examine the content of these communications, which is expensive in terms of processor overhead and bandwidth.
Nexlinx at its end has a secure email relay that takes a network-based approach. We have secured our server from spammer by rejecting sent email from Non-Nexlinx users. In addition to this we are using flexible but secure Rbls and Dnsbls that include widely used blocking list like sorbs, spamcop and etc.
We are controlling SMTP errors, create IP-based block and allow lists and verify recipients before they enter your network.
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