Spam Filtering

Blocking unsolicited email without interfering with your business mail requires a sophisticated spam defense. Every day, professional spammers develop new software and techniques with the sole purpose of finding weaknesses in spam filters. With ifXnews, you have the highest level of spam defense working hard to keep unwanted mail from your inbox.

Our Spam DNA Filtering® system gathers real-time spam intelligence from a number of sources and then actively using this intelligence to block spam. We track tens of thousands of live spam email characteristics ("DNA"), which identifies the majority of spam. In addition, a number of third-party spam databases, several DNS checks, and several message-formatting tests are used when analyzing each email.

All of this data is aggregated into a collection of several thousand constantly evolving spam tests that are performed on every email that enters the email hosting system.

The results of these tests are combined together to identify more than 98% of spam with virtually zero false-positives.

Filtering Highlights

Thousands of email characteristics ("DNA") are used to identify spam
25 third-party spam databases, several DNS checks, and message-formatting tests are also used when analyzing each email
DNA and other data are used to perform more than 45 tests on every email
Tests are combined into a weighting system and assigned a value
When the total weight of an email is greater than a certain sensitivity threshold it will be flagged as spam
Integrates with Return Path and Bonded Sender to minimize false-positives

Administrator and User Controls

Sensitivity can be controlled by administrators and end users
Email users can add senders, domains, and IPs to their safelist to ensure that email from these senders is never filtered as spam
Email users can add senders, domains, and IPs to their blacklist to ensure that email from these senders is always filtered as spam
Email users have several options for handling email once it is flagged as spam
Email users can choose the exclusive setting, which allows them to block email from senders outside of their safelist
Email administrators can also manage global spam preferences, safelists, and blacklists at the domain and the user level
Email users and administrators can enable greylisting, which helps reduce spam by evaluating the authenticity of email from unrecognized senders.