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Email Security Software with Allow/Block List (2026)

Last updated: April 2026

Key features of Email Security Software

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

  • Email Attachment Protection: Users value encryption, customizable blocking, and sandbox features for secure and straightforward handling of sensitive attachments. 95% of reviewers rated this feature as important or highly important.
  • Threat Response: Reviewers appreciate the quick, automated threat detection and response, which helps reduce IT resources and increases security. 95% of reviewers rated this feature as important or highly important.
  • Threat Protection: Users highlight strong phishing and malware detection, which effectively prevents threats from reaching inboxes and ensures data security. 94% of reviewers rated this feature as important or highly important.
  • Spam Blocker: Reviewers note effective spam filtering, customizable rules, and reduced clutter, making inbox management easier and more efficient. 94% of reviewers rated this feature as important or highly important.
  • Encryption: Users emphasize the importance of end-to-end encryption for securing sensitive communications, with ease of use being a crucial factor. 92% of reviewers rated this feature as important or highly important.
  • Reporting/Analytics: Reviewers find value in detailed reports and analytics that provide insights into email threats and help inform security decisions. 81% of reviewers rated this feature as important or highly important.
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25 software options

SpamTitan logo
Category Leaders

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

Read more about SpamTitan

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Microsoft Defender for Office 365 logo
Category Leaders

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.

Read more about Microsoft Defender for Office 365

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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.

Read more about Zerospam

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Selzy logo

Affordable email marketing software

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Selzy is an intuitive email marketing platform that suits any business needs. It offers a wide range of integrations with your favorite tools, an easy-to-use drag&drop editor, and email templates for any occasion.

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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.

Read more about Symantec Email Security.cloud

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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.

Read more about ALTOSPAM

Users also considered
Mailock logo

Secure emails with encryption and recipient authentication

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Exchange confidential information securely using your existing email infrastructure. Encrypt messages and authenticate your recipients.

Read more about Mailock

Users also considered
Libraesva Email Security logo
Category Leaders

Exceptional Email Security

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Libraesva Email Security stops known and emerging email threats from reaching their target, so you only receive legitimate messages. It provides exceptional email security by integrating cloud email and a secure email gateway with Libraesva’s unique Adaptive Trust Engine.

Read more about Libraesva Email Security

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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.

Read more about Trustifi

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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.

Read more about Mail Assure

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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.

Read more about Security Gateway by MDaemon

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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.

Read more about INLYSE Malware.AI

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Graphus logo
Category Leaders

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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ContentCatcher logo

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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SilverSky Email Protection Suite logo

Advanced email security and compliance for SMBs

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SilverSky Email Protection Suite is an email protection service that helps small and mid-sized businesses identify and prevent cybersecurity threats in compliance with industry regulations. Protects against targeted attacks, social engineering and data loss.

Read more about SilverSky Email Protection Suite

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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.

Read more about SpamHero

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Mailinblack logo

Cloud-based & on-premise email protection software

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Mailinblack is a cloud-based and on-premise email protection software, which helps organizations check incoming emails for spam or viruses and automatically sort them in inboxes. Features include anti-spear phishing, newsletter categorization, notifications, reporting and analytics.

Read more about Mailinblack

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Inky logo

The most effective solution when fighting phishing attacks.

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INKY is an endpoint protection tool that helps businesses leverage artificial intelligence (AI) technology and machine learning capabilities to identify and prevent phishing attacks. INKY can be integrated with Microsoft Exchange, Google Workspace and other applications.

Read more about Inky

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modusCloud logo

Cloud email security, encryption, and archiving

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modusCloud is a cloud email security solution with tools for spam detection, threat monitoring, email archiving, phishing detection, and more. The cloud-based platform offers features including filtering, continuity, encryption, and archiving in order to provide businesses with email protection.

Read more about modusCloud

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Heimdal Email Security logo

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.

Read more about Heimdal Email Security

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Fortra’s DMARC Protection logo
(0)

Software for protection from spoofing and phishing attacks

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Agari Brand Protection is a simple anti-phishing solution that helps enterprises prevent and recover from email spoofing attacks. Businesses can block phishing attacks with DMARC, SPF, DKIM, and other email authentication services.

Read more about Fortra’s DMARC Protection

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iQ.Suite aaS logo
(0)

Enterprise email management & security solution for M365

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iQ.Suite aaS is a cloud-based enterprise email management and security solution for companies using Microsoft 365. It offers a comprehensive set of features including content-driven encryption, insider threat detection, wrong recipient protection, and more. iQ.Suite aaS offers malware and spam detection to minimize risk and secure emails from unauthorized access. Additionally, to ensure company policies are met, this solution can be used to apply business policies to email communications.

Read more about iQ.Suite aaS

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EuropeanMX logo
(0)

Cloud-based anti-spam for incoming and outgoing messages

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Use the cloud redundancy solution EuropeanMX as a reliable spam filter. Our system offers nearly 100% filter accuracy and virtually no false positives. Protect your IP ranges before getting blacklisted. Continuously archive your emails with EuropeanMX to always have a backup of your emails.

Read more about EuropeanMX

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MailGuard logo
(0)

Speed Matters. MailGuard stops threats 2- 48hrs faster.

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MailGuard anticipates, predicts and learns from emerging zero-day threats like ransomware, phishing, spear-phishing, Business Email Compromise and similar malicious email-borne attacks, protecting email users from harm.

Read more about MailGuard

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