Best Anti-Spam Email Filters for Thunderbird

Best Anti-Spam Email Filters for Thunderbird

All of us get our email inboxes constantly bombarded, almost on a daily basis, with spam emails. As we all know, most of these spam emails bring with them malicious files or malware, which could end up damaging the system or network and stealing data as well. Hence, it becomes important that we try to protect ourselves from spam emails. Anti-spam email filter help us stay secure from all such spam emails.

Many of us use Thunderbird to organize our email communication. Hence let’s discuss in detail about three prominent anti-spam email filters for Thunderbird that would help filter out and remove spam from all the email we receive…

Thunderbird built-in anti-spam email filter

Thunderbird has its own anti-spam filter, which is built-in and which identifies and filters spam emails. It works when the user employs the junk tool button to mark a message as junk or legitimate, following which Thunderbird itself starts identifying and categorizing spam emails, putting the same in the corresponding spam box.

To turn on the Spam Filter in Mozilla Thunderbird, which uses Bayesian statistical analysis to filter out spam email, you have to follow these steps-

  • Select Preferences > Account Settings from the ‘Hamburger’ menu in Thunderbird.
  • Go to the Junk Settings category for each account and check “Enable adaptive junk mail controls for the selected account”
  • Click OK.

Comodo Dome Antispam

Many security experts recommend Comodo Dome, which is a business-based anti-spam software, as the ideal anti-spam email filter. Comodo Dome is available in the Cloud version, the On-premises version and also on the Dedicated Hosted Cloud version and boasts of great features, including antivirus scanning and filtering, containment, email classification and archiving, auto-whitelisting, user authentication, Reputation Network etc. Working with spam filters, antivirus scanners and a highly effective content analysis engine, Comodo Dome is a complete threat prevention system and helps identify and filter out spam emails. The user-friendly software is in high demand because of its automatic containment as well as intelligent filtering features. A centralized management console helps allocate and apply different levels of security to cater to the different kinds of demands that come from employees representing different departments in an organization.

MailWasher spam filter

This free anti-spam filter, which is great for Thunderbird, also works for Windows Live Mail, Outlook Express etc and functions in desktop computers as well as mobile devices. MailWasher helps users preview emails before they are sent to the inbox. MailWasher has an advanced paid version as well.

Preventing Thunderbird from overriding external spam filters

To prevent Mozilla Thunderbird from overriding external spam filters and to get Thunderbird to accept and use spam filtering scores created by such an external spam filter, follow these steps-

  • Open settings of the spam filter for the chosen email account in Mozilla Thunderbird.
  • Go to Preferences > Account Settings > Junk Settings
  • Make sure you check Trust junk mail headers set by: and see the list under Selection.
  • Choose the spam filter that you are using, from the list.
  • Click OK.

Related Resources:

What is Spam Filter and How it Works? | Types of Spam Filters Overview

Julia Sowells960 Posts

Julia Sowells has been a technology and security professional. For a decade of experience in technology, she has worked on dozens of large-scale enterprise security projects, and even writing technical articles and has worked as a technical editor for Rural Press Magazine. She now lives and works in New York, where she maintains her own consulting firm with her role as security consultant while continuing to write for Hacker Combat in her limited spare time.

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