13 Anti-Spam Programs That Will Definitely Block Your Email Spam

Find the Best Anti-Spam Solution for Your Needs

Let’s start with the type of anti-spam solution you’re looking for—click on the situation that fits you best:

• I’m looking for an email anti-spam appliance for my iPhone/Android device.
• I want an email spam blocker for my Gmail, Outlook, Apple Mail, Yahoo, iPhone—you name it.
• I’m looking for a cloud-based anti-spam protector.
• I’m looking for server-hosted anti-spam software.
• My main priority is the price.
• I’m interested in enterprise anti-spam solutions.

Best for Regular Gmail, Outlook, and Other Email Services

These are solutions suitable for personal or small business users with standard email accounts like Gmail, Outlook, or Yahoo Mail.

• Clean Email – 👍Blocks all new senders from reaching your inbox unless you approve them (Screener feature). Offers affordable plans for 1, 5, or 10 email accounts. Designed for regular email users and small businesses. Try Clean Email for free.

• Spam Bully – Integrates well with Outlook and other email clients.
• SpamSieve – Great for Apple Mail users.
• SPAMfighter – Useful for non-English users and personal email protection.
• MailWasher – An easy-to-use anti-spam tool for individuals.
• MX Guarddog – An affordable option for small businesses or personal use.

Cloud-Based Email Spam Blockers

I'm sure this is a great choice for personal use. Why? Because these email anti-spam solutions work in the cloud, so there's no need for on-site hardware. It's much easier to access and use.

• Clean Email – 👍A fully cloud-based email management tool focused on inbox organization and spam removal. Try Clean Email for free.
• N-Able Mail Assure – A cloud-based spam filtering solution with advanced threat protection.
• SpamTitan – Offers both cloud and gateway-based solutions, making it highly flexible.
• Hornetsecurity’s Email Spam Filter – A cloud-based filter specifically designed for Office 365 users.
• Symantec Email Security.cloud – A cloud-native enterprise solution for anti-spam and email security.
• MailChannels – A cloud-based filtering and email delivery solution.
• MX Guarddog – Operates entirely in the cloud with affordable pricing per email address.

Server-Hosted Anti-Spam Solutions

I like these spam-blocking solutions because they're big and powerful. However, they're best suited for organizations with a dedicated IT infrastructure since they need to be installed on local mail servers or dedicated gateways.

• Securence – Designed for spam protection for businesses and nonprofits, requiring server-side setup.
• Comodo Secure Email Gateway – A dedicated on-premises or hybrid security email anti-spam gateway for businesses.

Best Email Anti-Spam Appliances for Mobile Usage

Many email security solutions work well on desktops and mail servers, but not all are optimized for mobile usage. That’s why I’ve listed mobile-friendly options separately.

Some offer dedicated mobile apps, while others provide cloud-based filtering that works seamlessly on any device.

Mobile apps for hands-on email spam management

• Clean Email – 👍Full-featured iOS and Android apps, allowing users to filter spam, unsubscribe from emails, and manage their inboxes from mobile.
• SpamSieve – Compatible with Apple Mail on iOS, but requires a Mac to function properly.

Fully mobile-compatible cloud-based spam blockers

These anti-spam tools protect your inbox regardless of whether you check your email on a smartphone, tablet, or desktop.

• Clean Email – 👍Fully cloud-based, with dedicated iOS and Android apps that offer full spam filtering and inbox management on mobile.
• N-Able Mail Assure – Accessible via mobile browsers but no dedicated mobile app.
• SpamTitan – Web-based interface that works on mobile.
• Hornetsecurity’s Email Spam Filter – Fully cloud-based and optimized for Office 365 users, accessible via mobile.
• MailChannels – Cloud-based and works seamlessly for mobile email filtering.
• Symantec Email Security.cloud – Cloud-native solution that filters spam at the server level, protecting mobile inboxes without requiring installation.
• MX Guarddog – Affordable spam filtering that works across mobile devices via standard email integration.

Paid vs. Free Spam Protectors

Paid email spam blockers

I feel safe and protected with paid spam blockers because it's clear where the company’s income comes from. Paid solutions focus on quality and data security, so your emails and sensitive data won’t be leaked. Plus, they come with premium features that work for both businesses and individuals.

• Clean Email – 👍Offers premium plans (and discounts!) for advanced inbox management and spam filtering. Try Clean Email for free.
• N-Able Mail Assure – A paid cloud-based anti-spam tool with high accuracy.
• SpamSieve – Requires a one-time license purchase.
• SpamTitan – Paid plans tailored for businesses.
• Securence – Offers paid plans for small businesses and nonprofits.
• Comodo Secure Email Gateway – A paid enterprise-grade security solution.
• Hornetsecurity’s Email Spam Filter – Premium cloud-based security for business users.
• MailChannels – Paid plans aimed at improving email delivery reliability.
• Symantec Email Security.cloud – An enterprise-grade paid security service.

Free anti-spam software

I want to point out that free options provide basic spam protection, but they come with limits on features or email volume.

• MailWasher – Offers a free version with manual spam filtering capabilities.
• SPAMfighter – Has a free version for personal use (with ads).
• MX Guarddog – No upfront costs but requires a donation-based system.

Enterprise Spam Filtering Services

These solutions provide advanced spam filtering and security features designed for businesses.

• N-Able Mail Assure – Ideal for enterprises requiring high accuracy.
• SpamTitan – Widely used in enterprises and MSPs.
• Securence – Built for businesses and nonprofits.
• Comodo Secure Email Gateway – Designed for large enterprises with high email volume.
• Hornetsecurity’s Email Spam Filter – Focuses on securing Office 365 environments.
• MailChannels – Improves email deliverability for enterprises.
• Symantec Email Security.cloud – Provides enterprise-level security and compliance features.

13 The Most Effective Email Spam Blockers

2. N-Able Mail Assure (formerly SolarWinds)

Price: From $1/mailbox/month with volume discounts available

• Cloud-based
• Paid
• Enterprise-grade solution

N-Able Mail Assure is a cloud-based email spam-blocking service that offers a unique value proposition for many MSPs and IT Pros working in SMBs. The product has flexible pricing options and offers over 99.9% spam filtering accuracy, business continuity, and email archiving. N-Able Mail Assure was originally part of SolarWinds before N-Able became a separate company.

N-able Mail Assure stands apart from its competitors because it is built on technology that is developed in-house. Whereas some other email security providers resell technology, N-able has full control over its tech stack and quickly responds to new email-borne threats.

Since Mail Assure is also a cloud-based email filtering service, it’s easy for individuals and businesses to configure and deploy, regardless of the systems they use. It also uses SSL/TLS traffic encryption, and seamless integration with Microsoft Office 365 and Outlook via an add-in and single sign-on.

3. SpamBully

Price: $29.95 annually

• Paid
• Best for Outlook and other personal email clients

SpamBully is a relatively affordable email spam service at just $29.95 for a yearly subscription. It’s straightforward to install and intuitive to use, making it an accessible option for nearly any user. It offers detailed email information, phishing detection, spam blocking, message quarantine, and blocklist data.

While SpamBully offers a wide array of beneficial perks, one of its key features is its ability to learn what each user considers spam and adapt its settings based on your needs. The program will monitor your behavior over the first few weeks of use to determine how to filter spam in the future.

Unfortunately, one potential drawback of SpamBully is the fact that it is only available for Windows email clients, meaning Outlook, Live Mail, Outlook Express, and Windows Mail.

However, for anyone using Outlook or Microsoft, this third-party email filter offers a robust suite of features that make it easy to keep your inbox clean and reduce the time you spend managing emails you aren’t interested in.

4. SpamSieve

Price: one-time purchase of $30

• Paid (one-time license)
• Best for Apple users (Apple Mail, Outlook for Mac)

SpamSieve offers one of the most powerful and well-known spam filtering services for Mac and is compatible with operating systems as far back as 10.7, with older versions of the software available for machines at 10.2 or newer. SpamSieve also works with the iOS app. The desktop version can keep junk out of your mobile inbox if you use Apple Mail.

Like SpamBully, SpamSieve uses adaptive learning capabilities to change its behavior over time. Additionally, this spam email blocker integrates with your macOS Contacts App to ensure that messages from your trusted contacts are never accidentally marked as spam. Furthermore, you can customize your SpamSieve experience through settings and scripts.

Unlike some other anti-spam software on this list, SpamSieve works as a plug-in to your current inbox. This means you don’t need to open another application just to access your settings and functions for your spam filtering—you can just open your email client. Although it’s only compatible with macOS, SpamSieve connects to Apple Mail, Outlook for Mac, Airmail, and other popular macOS email clients.

For users who are skeptical of committing to a program without having tested it, SpamSieve offers a 30-day trial during which users have access to the entire set of features. However, based on my testing, I believe SpamSieve is the best email filtering service for individual Mac users.

5. Securence

Price: Quote Required

• Server-based, hosted email spam filter
• Paid
• Best for small businesses and nonprofits
• Enterprise-grade solution

Securence is a popular spam filtering service for small businesses, educational and governmental bodies, and enterprises. Interested parties can set up a 30-day free trial on their website, at which time they will receive a custom quote based on the size of their business and the scope of their needs.

One of the biggest benefits of Securence for businesses is the fact that it requires very little maintenance or upkeep once you work through the initial setup with your company email platform.

Another impressive feature is that it doesn’t just block spam email; it also notifies users when messages are blocked or quarantined. The software also filters and reads mail logs, effectively flags junk and malware, and even stops phishing attempts.

However, one of the features of Securence that I found most beneficial for modern companies is its business continuity service, which ensures that your organization will maintain access to email even in the event of an unexpected loss of service. Avoiding downtime is more crucial than ever in such a connected time, and Securence makes that a top priority.

6. SpamTitan

Price: Quote Required

• Cloud-based & Server-hosted options
• Paid
• Enterprise-grade solution

SpamTitan pledges to stop 99.9% of spam before it reaches your inbox, drastically reducing the time spent on managing your email accounts. Like Securence, SpamTitan provides a 30-day free trial to potential clients, including free technical support, after which interested users can seamlessly access their existing settings and information in the premium version.

Unlike other options on this list, SpamTitan includes two different antivirus protection mechanisms to ensure that nothing, even potentially compromising, ever reaches your inbox. It scans all parts of inbound messages, including links and attachments.

Additionally, SpamTitan will scan and discover phishing email attacks, spear-phishing attacks, and zero-day attacks that may target your inbox.

SpamTitan combines machine learning and Bayesian analysis, which helps it work most effectively for you while also catching any new threats before you notice them. However, SpamTitan can be difficult to navigate, especially for less tech-savvy customers.

7. MailWasher

Price: Free (for single email address)

• Free version available
• Paid for premium features
• Best for regular Gmail, Outlook, and other personal email accounts

MailWasher claims a user base of over 8 million people, and it’s easy to see why so many have been drawn to its features and accessibility. In contrast to many other applications described above, MailWasher is the only spam email filter that offers an entirely free spam blocker in addition to a paid version.

Based on my testing, MailWasher offers the best free email spam filter for a single inbox. Regardless of which version of MailWasher you use, it will block spam before it reaches your inbox by previewing and deleting messages that seem suspicious.

Additionally, the program scans for offensive content and filters out messages it deems “inappropriate.”

While many users are content with the features available as part of the free version of MailWasher, there are substantial benefits to upgrading, currently $49.95 per year. In addition to all free features, premium users can use MailWasher with multiple addresses and receive technical support and other capabilities.

8. Comodo Secure Email Gateway

Price: Quote Required

• Server-based, hosted email spam filter
• Paid
• Enterprise-grade solution
• Handles large message volumes

Designed for enterprise users, Comodo Secure Email Gateway is an email spam filtering service that can handle large volumes of unwanted email messages. It relies on Comodo’s patented containment technology, which allows users to open attachments in isolated containers, where they are analyzed to determine whether or not they’re safe. Only when an attachment is considered to be safe is it allowed to leave the container.

Comodo Secure Email Gateway is a third-party spam filter available in the cloud, dedicated hosted cloud, and on-premises. All versions of this spam filtering solution offer many extra features, including full malware filtering, email classification, banner and plugin filtering, DoS attack prevention, and IPv6 support.

What really impressed us about Comodo’s spam filtering is its unique approach. Unlike other antispam service options, this app analyzes files for threats before they arrive in the inbox, and then sandboxes them. In other words, all attachments are placed in a protected environment to catch any malicious activity or phishing attempts before they happen.

By doing this, Comodo Secure Email Gateway helps you ensure you can open any and all attachments without any fear of what they may do to your system.

Furthermore, the program’s advanced filtering methods can help you easily trash or sort emails based on sender, attachment size, or keywords within the email.

While Comodo offers a powerful email spam blocker, its software is best suited for enterprise-level users.

9. SPAMfighter

Price: starts at $29.99

• Free version available (with ads)
• Paid version for additional features
• Best for non-English users
• Best for personal email users

SPAMfighter is a capable spam filtering solution for Outlook, Outlook Express, Thunderbird, Windows Mail, and Windows Live Mail users. It runs only on Windows XP, Windows Vista, Windows 7, and Windows 10. This spam filtering solution has been translated into most major languages, including English, Chinese, and German, which makes it an ideal solution for international businesses.

Like a guard, SPAMfighter checks all new emails that arrive in your inbox and tests them to determine if they are legitimate. When SPAMfighter finds an email that's not legitimate, it automatically removes it from your inbox and moves it to the junk folder. Should a spam email message slip through, you can simply mark it as spam with a single click, which automatically removes it from all other community members.

Furthermore, SPAMfighter offers live statistics for all messages, including your total inbox volume, spam-to-message ratio, and the total number of blocked spam attempts made in a specific period. These tools can be highly useful for businesses, but also for individuals who are curious about the amount of junk they receive.

10. Hornetsecurity’s Email Spam Filter and Malware Protection (formerly ZEROSPAM)

Price: Quote Required

• Cloud-based
• Paid
• Enterprise-grade solution
• Best for Office 365 users

Hornetsecurity’s email spam filtering service (formerly ZEROSPAM) stands as a top-tier defense against cyber threats via email. Boasting a 99.9% spam detection and 99.99% virus detection rate, it's recognized as one of the best email filtering solutions on the market.

The service effectively shields mail servers from DDoS attacks and phishing emails, utilizing multi-layered antispam mechanisms that block the bulk of spam emails upon arrival. This ensures that the quarantine remains uncluttered and user-friendly.

Additionally, the Hornetsecurity anti-spam appliance comes equipped with intelligent protection mechanisms distributed across multiple data centers, safeguarding legitimate mail traffic even under the onslaught of large-scale DDoS attacks and waves of spam.

With a fully managed solution, Hornetsecurity handles the management, operation, and monitoring, ensuring consistent performance and an impressive 99.99% uptime. For IT administrators, the system is intuitive, with essential information easily accessible and settings that can be quickly configured.

11. MX Guarddog

Price: $0.25 per email address per month

• Cloud-based
• Donation-based pricing (not entirely free, but low-cost)
• Most affordable per email address
• Suitable for small businesses and individuals

MX Guarddog is a cloud-based email spam filter that serves as the first line of defense against junk, computer viruses, malware, phishing emails, spoofed undeliverable notices, and Denial of Service attacks (DoS). When MX Guarddog detects a suspicious email, it moves it to quarantine and, at the same time, sends you a notification so you can decide what to do with it.

MX Guarddog uses TLS-based encryption and Perfect Forward Security (PFS) to keep your emails secure, and it also offers 99.95% SLA, which means that it shouldn’t be unavailable for more than a little over 4 hours per year, making it very dependable.

You can try MX Guarddog for free for 30 days to see how it works. After the free trial period ends, MX Guarddog charges $0.025 per email address per month. So if you want to use this spam filtering service with 100 email addresses, your monthly cost will be $100.

12. MailChannels

Price: Starting at $79.99/month

• Cloud-based
• Paid
• Enterprise-grade solution
• Best for fixing email deliverability issues

Businesses that offer web hosting or manage multiple email domains need a robust way to stop spam emails for both inbound and outbound mail. That’s exactly the solution MailChannels offers — protection from unsolicited emails and more for enterprise-level users.

One key benefit of MailChannels is the fact that it uses behavior analytics and response analytics to provide multi-layered spam, malware, and phishing protection. Also, unlike other spam filter programs, this service provides detailed message logs so users can easily figure out why a message was blocked or quarantined.

Unfortunately, MailChannels is not an inexpensive solution. Since it is made for enterprise users, you can’t obtain a plan for less than $79.99/month. That being said, this rate is actually quite affordable for users who manage inboxes that send and receive thousands of messages per month.

13. Symantec Email Security.cloud

Price: Quote Required

• Cloud-based
• Paid
• Enterprise-grade solution
• Offers advanced threat protection

Symantec Email Security.cloud is a cloud-based email security solution that offers many advanced features for users who need high levels of protection. Although research shows this solution costs more than some other options, it may be worth it if you need what it offers.

One of the major selling points for Symantec Email Security.cloud is that it is programmed to handle advanced email attacks and protect against data leaks. If your email account ever contains financial documents or similar sensitive information, this could be exactly the spam filter you need.

📌 I also noticed that it provides security against phishing and spear phishing attacks.

Although most spam blockers will let you add individual email addresses to a blacklist, Symantec Email Security.cloud lets users lock IPs and Domains as well. Furthermore, you can find detailed reports within the app’s built-in dashboard, meaning you can look for patterns or make changes as needed based on the data you see.