--- title: "What Are The Essential Factors To Consider When Selecting The Best Spam Filtering Solutions | DuoCircle" description: "Join the thousands of organizations that use DuoCircle Find out how affordable it is for your organization today and be pleasantly surprised.Interested in" image: "https://www.duocircle.com/images/og-default.png" canonical: "https://www.duocircle.com/content/cloud-based-spam-filter/spam-filtering-solutions/" --- Content # What Are The Essential Factors To Consider When Selecting The Best Spam Filtering Solutions Join the thousands of organizations that use DuoCircle Find out how affordable it is for your organization today and be pleasantly surprised.Interested in [ Talk to an Expert → ](/contact/) [ See what we make ](/products/) ## What Are The Essential Factors To Consider When Selecting The Best Spam Filtering Solutions [Spam Filtering - Sign Up](/email/spam-filtering) _Spam is an ever-increasing threat in the cyber world_. We can gauge the extent of this menace from the fact that almost half of the emails received across the globe count as spam. A spam message carries different forms of malicious content and is a top-rated electronic junk. _Besides carrying out employee training exercises, enterprises need an all-round approach to tackle this threat._ Therefore, unless an enterprise has a system of reliable and effective **spam filtering solutions**, it remains vulnerable to the danger. A spam filtering service, be it a [cloud-based spam filter](/content/cloud-based-spam-filter), or on-premise solution, employs pre-defined criteria, which looks through the overall content of an email. If the content doesn’t align with the set standards, it will be detected and ultimately blocked from entering the user’s inbox. ![email spam filtering service](https://media.mailhop.org/duocircle/images/2019/02/phishing-protection-guide.png) ### 5 Essential Features of Spam Filtering Solutions Before selecting a **spam filtering service**, organizations need to look for the following [features](https://rickscloud.com/8-features-your-spam-filtering-service-must-include/): #### Outbound And Inbound Spam Filtering Spam filters work on receiving as well as sending emails. When they apply their protocols on received emails, then it is known as [inbound spam filtering](/content/cloud-based-spam-filter/inbound-spam-filtering). Incoming spam filters track the sender’s IP addresses from which the message originated. On the other hand, _prevention from sending malicious emails is known as outbound spam filtering_. Both types of filtering services protect the enterprise’s reputation, along with detecting spam and categorizing spam. #### Efficient Spam Filter Relay [Spam filter relay](/content/cloud-based-spam-filter/spam-filter-relay) is a powerful end source relay server that offers a **secure configuration** system. These servers unite through multiple servers and download configuration data regarding users and domains. [This feature](http://www.ftgate.com/home/ftgate-relay-edition/) further allows the relay to apply efficient filtering of inbound messages. _Users are protected from senders that do not exist in the safe mail network_. #### All-In-One Solution It means looking out for viruses, along with denial of service attacks and directory harvesting attacks. _Detecting viruses is an essential feature of good spam filtering solutions_. Some services make use of different spam filters at a single time, to ensure blockage of spam from every possible angle. #### Informative And Accountable _A spam filtering solution without adequate instructions and information is not a reliable service_. It should provide necessary information about your queries and also instructions on making efficient use of the service. They should tell how inbound and outbound messages are filtered. Plus, the list of suspended senders or archived emails should be transparent. An accountable response on the part of **spam filtering solutions** is mandatory. The probability of occurrence of false positives should be zero so that the organization doesn’t face a loss of its essential data. #### Compatibility With All Platforms _Restrictions on using specific platforms may not prove to be helpful and might increase the operational cost_. Spam filters can be installed either as software or as hardware. But, today, organizations are shifting fast towards **cloud-based spam filter** solutions because of the inherent advantages they bring. So, looking for platform compatibility in the cloud-based filter is also one of the primary concern. _Superior cloud-based technology is always known to remain up to date_. ### Some Enterprise Spam Filter Reviews And Ratings Given below are some of the [enterprise spam filter reviews and ratings](/content/cloud-based-spam-filter/enterprise-spam-filter-reviews-and-ratings) of best **enterprise email security** software mentioned at Capterra. #### Email Security Cloud by Symantec Rating 4.5/5 Top review: ‘High-end email security.’ #### Spam Titan by TitanHQ Rating 4.5/5 Top review: ‘Antispam that is affordable, flexible and powerful.’ #### Spambrella Rating 5/5 Top review: ‘Robust, versatile and reliable.’ #### MailCleaner Rating 4.5/5 Top review: ‘MailCleaner is a complete and free email solution for you.’ #### Comodo Dome Antispam by Comodo Group Rating 4.5/5 Top review: ‘My preferred antivirus software.’ ![cloud email spam filter](https://media.mailhop.org/duocircle/images/2019/02/right-phshing-solution.png) ##### Join the thousands of organizations that use DuoCircle --- Find out how affordable it is for your organization today and be pleasantly surprised. [Spam Filtering - Sign Up](/email/spam-filtering)Interested in our Partner Program for MSPs and VARs? Visit Our [MSP Partner Program](/msp-partner-program). ## Ready to talk? Same-day response from someone technical. We tell you yes or no quickly. If yes, we get to work. [Talk to an Expert→](/contact/)[See what we make](/products/) ```json {"@context":"https://schema.org","@type":"Organization","name":"DuoCircle LLC","url":"https://www.duocircle.com","logo":{"@type":"ImageObject","url":"https://www.duocircle.com/images/duocircle-logo.png"},"description":"DuoCircle is a portfolio of specialized email products covering protection, authentication, delivery, and routing. We deliver about 90% of category-leader capability at roughly half the price, backed by experts who own the outcome. 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