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Anti-spam Software with Allow/Block List (2026)

Last updated: March 2026

Why is allow/block list important for anti-spam software users?

Based on GetApp's analysis of verified user reviews collected between July 2021 and August 2024.

The allow/block list effectively manages unwanted emails and calls, protects against scammers, and ensures important messages are received. It simplifies user control over communications, enhancing overall security and privacy. Of the 135 reviewers who rated allow/block list, 93% rated this feature as important or highly important.

Key features of anti-spam software based on insights from 430 verified reviews

  • Spam Blocker: Users value the spam blocker's effectiveness in filtering unwanted emails, calls, and messages while minimizing false positives. 95% of reviewers rated this feature as important or highly important.
  • Spam Detection: Reviewers highlight the AI capabilities in detecting and quarantining spam, reducing inbox clutter, and protecting against phishing. 93% of reviewers rated this feature as important or highly important.
  • Spam Quarantine: Users find the quarantine feature useful for isolating potential threats and allowing review and recovery of emails. 92% of reviewers rated this feature as important or highly important.
  • Phishing Protection: Reviewers commend the detailed analysis and filtering of phishing attempts to protect personal and business data. 88% of reviewers rated this feature as important or highly important.
  • Anti Virus: Users note the comprehensive virus scanning and real-time threat blocking, enhancing overall system security. 87% of reviewers rated this feature as important or highly important.
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33 software options

ContentCatcher logo

ContentCatcher

Cloud-based email security, phishing protection & anti-spam

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ContentCatcher is a web-based SaaS solution offering email security, encryption, anti-spam, phishing protection and compliant archiving to assist organizations of all levels to combat and mitigate malicious email threats, with features including anti-virus, filtering, URL defense, reporting and more

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Heimdal Email Security logo

Heimdal Email Security

Email Protection in a Redefined Spam Filter

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Heimdal Email Security is an email protection solution that combines advanced spam filtering with robust malware prevention through a multitude of modern technologies.

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SpamTitan logo

Anti-spam filter for business email. Vital email security.

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SpamTitan blocks spam, viruses, malware, ransomware, phishing attempts and other email threats. SpamTitan provides advanced yet easy to use email security for your business. Office 365 friendly

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Microsoft Defender for Office 365 logo

Cloud-based email security and threat management software

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Microsoft Defender for Office 365 is a cloud-based email security software designed to help businesses automatically detect, investigate, and resolve potential email threats on a centralized platform. Supervisors can configure security policies, perform spoof checks, and maintain a record of reported incidents.

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Zerospam logo

Cloud email security & anti-spam solution

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ZEROSPAM is a complete cloud email security and anti-spam solution that protects domains against spam, ransomware, spear phishing, viruses, phishing and all harmful emails. Detect disguised executable files & infected macros sent as attachments via emails or downloaded through a malicious link.

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Symantec Email Security.cloud logo

Anti-spam and email security software

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Symantec Email Security.cloud is an anti-spam software designed to help businesses filter unwanted messages and protect the system from email-borne viruses. The platform offers data loss prevention functionality, which enables managers to encrypt and control sensitive data.

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Topsec Cloud Solutions logo

Your Managed Email Security Specialists

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Topsec Email Security is a complete email filtering solution that helps organizations to check all their incoming and outgoing email content for virus and spam.

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ALTOSPAM logo

Effectively protect all your company's emails

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ALTOSPAM is an email protection solution for all businesses, associations and local authorities. Choose advanced email security compatible with all mail servers, including Office 365. Try ALTOSPAM for free.

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LeanMail logo

Don't give up finding a solution for email until you try LM

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Get Total Control Over Outlook. For every type of user and every personality type. Five easy, customizable solutions that give you all the control over your inbox that you want.

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Truecaller logo

Spam Blocking and Caller ID

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TrueCaller is a robust spam blocking solution designed to identify unknown numbers, block numbers from telemarketers and robocallers, and centralize all SMS/calls in one platform. TrueCaller includes call blocking, intelligent dialer, call recording, caller identification, integrated Chat/SMS capabilities, and a spam-free inbox.

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ESET Home Office Security Pack logo

Cloud-based cybersecurity solution for SMBs

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ESET Home Office Security Pack is a comprehensive solution for small and medium-sized businesses and startups that need to protect digital equipment

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Trend Micro Smart Protection Complete Suite logo

Security and threat management solution

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Trend Micro Smart Protection Complete Suite, powered by Trend Micro's groundbreaking Enterprise Security Suite (ESS) and fortified with Managed XDR is a cutting-edge managed detection and response solution.

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MailCleaner logo

Cloud & on-premise anti spam software for businesses

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MailCleaner offer cloud or on-premise anti spam and anti virus protection for ISP SME SMI & large companies, non profit organizations and governments

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Mail Assure logo

Email, Secured.

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Cloud-based email security designed to help your customers stay in control while safeguarding their inbound and outbound email.

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Trustifi logo

Protect Your Business Emails with AI-Powered Security

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Email security solution that helps manage threat detection, regulatory compliance, data encryption, whitelisting/blacklisting, and more.

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Security Gateway by MDaemon logo

Powerful yet flexible email security software.

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Security Gateway by MDaemon is an email security software designed to help businesses secure email servers from malware and phishing attacks. The solution enables administrators to automatically detect threats across various platforms including Microsoft Exchange Server and Office 365.

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INLYSE Malware.AI logo

VISUAL AI BASED MALWARE DETECTION

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INLYSE Malware.AI is a revolutionary visual AI-based malware detection solution that utilizes cutting-edge technology to convert files into graphical representations and analyze them comprehensively for any signs of malware.

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ESET PROTECT MDR logo

Future ready protection for enterprise

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Airtight protection of your IT environment,
with complete cyber risk management and
world-class ESET expertise on call.

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Spam Filtering and Malware Protection logo

Spam filter service for email inboxes

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Hornetsecurity Spamfilter is a spam filter service designed to help enterprises detect & protect email mailboxes from spam, malware and viruses, with spam recognition & virus detection technology, plus adjustable content filters for unwanted attachments, statistics, encrypted data traffic, and more

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Graphus logo

Cloud-based email security software

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Graphus is a cloud-based anti-phishing software, which helps protect organizations against email attacks, credential theft, malware, ransomware, identity spoofing, brand impersonation, business email compromise (BEC), account takeover (ATO) and other threats.

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SilverSky Email Protection Suite logo

Advanced email security and compliance for SMBs

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Reduces risk exposure and corporate liability by safeguarding your email with anti-virus and anti-spam technologies that block malicious software and spam at the gateway. SilverSky protects small and mid-sized businesses to prevent targeted attacks, social engineering attacks and data exfiltration.

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SpamHero logo

Saving the world from spam, one domain at a time!

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SpamHero is a cloud-hosted spam filtering solution available. Stop the spam, viruses, and phishing attacks before they reach your network.

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Mailinblack logo

Cloud-based & on-premise email protection software

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Protecting businesses from malware, phishing, ransomware, and spam emails.

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SPAMfighter Exchange Module logo

Anti-spam and network security solution

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SPAMfighter Exchange Module is an anti-spam solution designed to help businesses identify and prevent spam messages, email fraud, and phishing attacks. The centralized dashboard allows users to deploy updates, blacklist suspicious emails, generate custom reports, and handle data encryption processes.

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CleanTalk logo

Spam-free websites with real-time & cloud-based protection

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CleanTalk is a cloud-based spam protection service for websites, blocking spam in comments, forms, and registrations. Users can skip CAPTCHAs and there's no need for manual moderation. It supports WordPress, Joomla, WooCommerce, and more. The tool is also GDPR-compliant.

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