Die 29 besten E-Mail-Sicherheits-Programme im Test 2026

Red Sift OnDMARC is a cloud-based email security platform that protects against phishing and business email compromise (BEC) by enforcing email authentication standards like DMARC, DKIM, and SPF. It helps ensure only authorized messages reach inboxes while blocking spoofing attempts that could compromise your brand or users.

Why I picked Red Sift OnDMARC: I picked OnDMARC for its focus on dynamic domain control—you can manage SPF, DKIM, and DMARC records across all domains and subdomains without needing direct DNS access. This is especially helpful for IT teams juggling complex email setups. The platform also uses AI to assess your security posture and flag misconfigurations before they become vulnerabilities. Combined with its full DMARC enforcement timeline and hands-on customer support, it’s a strong pick for teams looking to shore up their email defenses quickly and confidently.

Standout features & integrations:

Features include Radar, which detects and resolves authentication issues fast; BIMI integration, helping your brand logo display in inboxes that support it; and Brand Trust, which flags lookalike domains that could be used in phishing attacks.

Integrations include Microsoft Azure Active Directory, SAML, Okta, OnDMARC API, Google Workspace, Office 365, Cisco Secure Email, Mimecast, Proofpoint, Barracuda, Sophos, and Zscaler.

PowerDMARC is a DMARC monitoring service designed for businesses looking to enhance their email security through authentication solutions. It serves IT teams and security professionals by offering DMARC, SPF, DKIM, MTA-STS, and BIMI functionalities. 

Why I picked PowerDMARC: It excels in ensuring DMARC compliance, which is crucial for protecting your domain from phishing and email spoofing. It provides DMARC reporting and TLS-RPT reporting to give you insights into your email authentication status. The reputation monitoring feature helps you track your domain's reputation across the web. AI-driven threat intelligence adds an extra layer of protection by identifying potential threats.

Standout features & integrations:

Features include tools for DMARC and TLS-RPT reporting that provide comprehensive insights into your email security status. Reputation monitoring helps you track your domain's standing across different platforms. AI-driven threat intelligence identifies and mitigates potential threats before they impact your organization.

Integrations include Microsoft 365, Google Workspace, Cisco Email Security, Proofpoint, Barracuda, Mimecast, Zimbra, SendGrid, Mailgun, and Amazon SES.

Spike is an email application designed for enhancing communication and collaboration within teams. It serves remote teams and customer support solutions by integrating features like a unified inbox and video meetings. 

Why I picked Spike: It focuses on team collaboration, making it ideal for remote work environments. It combines email, chat, and video calls into one platform, reducing the need to switch between different apps. It's collaborative notes and task management features help your team stay organized. The AES-256 encryption ensures your data remains secure, aligning well with its privacy-focused approach.

Standout features & integrations:

Features include a unified inbox that merges emails and chats, reducing clutter and improving focus. Collaborative notes allow your team to create and edit documents together in real-time. Video meetings are integrated directly, so you can connect face-to-face without leaving the app.

Integrations include Google Drive, Dropbox, OneDrive, Slack, Zoom, Trello, Asana, Google Calendar, Microsoft Teams, and Evernote.

TitanHQ is an email security solution tailored for businesses focused on preventing phishing and other email-based threats. It serves IT teams and organizations needing protection against spam, malware, and zero-day attacks. 

Why I picked TitanHQ: It excels in phishing protection, offering an impressive 99.9% spam blocking rate. Its AI-driven approach includes advanced threat detection and data leak prevention. The easy setup process makes it accessible, even for teams with limited IT resources. Excellent customer support ensures you get the help you need when you need it.

Standout features & integrations:

Features include advanced threat protection that detects and blocks sophisticated phishing attempts. Data leak prevention ensures sensitive information doesn't leave your organization unintentionally. Sandboxing technology analyzes suspicious emails in a safe environment before they reach your inbox.

Integrations include Office 365, G Suite, Microsoft Exchange, Outlook, Zimbra, Kerio Connect, Lotus Domino, Barracuda, and Mimecast.

Proofpoint Email Protection is a cloud-based solution that helps organizations block phishing, malware, and other targeted email threats. It’s mainly used by large IT teams who need strong visibility into their email traffic and threat response tools.

Why I picked Proofpoint Email Protection: It gives your team granular control over policy settings and filtering logic. It uses dynamic reputation scoring and targeted attack protection to catch threats early. The platform helps you isolate and analyze suspicious messages before they reach users. It also lets you track attacks by user, location, and threat type in one place. If you’ve got a large org and complex risk profiles, it’s built for that kind of scale.

Standout features & integrations:

Features include message tracing with full click-through logs, delegated admin roles for team-based management, and granular quarantine controls. You can set custom rules that apply across user groups or locations. It also tracks threats by campaign, so your team can study how attacks unfold.

Integrations include Microsoft 365, Google Workspace, Okta, Azure AD, Splunk, ServiceNow, Slack, Palo Alto Networks, and CrowdStrike.

Microsoft Defender for Office 365 is an email security solution designed to protect Office 365 users from threats like phishing and malware. It primarily serves businesses using the Microsoft 365 suite, offering protection and threat management. 

Why I picked Microsoft Defender for Office 365: It's tailored for Office 365 users, integrating directly with the suite to provide seamless protection. The solution includes advanced threat protection features that detect and block harmful emails. Real-time threat intelligence helps your team stay informed about emerging risks. With its built-in protection, it simplifies security management for businesses using Office 365.

Standout features & integrations:

Features include advanced threat protection that identifies and neutralizes email threats before they reach your inbox. Real-time threat intelligence provides insights into potential risks, helping you stay ahead of threats. The solution also offers automated investigation and response to streamline threat management.

Integrations include Microsoft Teams, SharePoint, OneDrive, Azure Active Directory, Dynamics 365, Power BI, Yammer, Skype for Business, Intune, and PowerApps.

Mimecast Email Security is a cloud-based service designed to protect businesses from email threats such as phishing, malware, and spam. It serves small businesses by providing email protection, archiving, and continuity services. 

Why I picked Mimecast Email Security: It is tailored for small businesses, offering comprehensive protection without the need for extensive IT resources. The service includes targeted threat protection to block spear-phishing and impersonation attacks. Its easy-to-use dashboard allows you to monitor and manage email security effectively. Additionally, Mimecast provides continuity services that ensure email access during server downtime.

Standout features & integrations:

Features include targeted threat protection that helps identify and block sophisticated email threats. Email archiving ensures compliance and data retention with easy access to archived emails. Continuity services keep your email up and running even during outages, ensuring business continuity.

Integrations include Microsoft 365, Google Workspace, Microsoft Exchange, Outlook, Salesforce, SharePoint, Slack, Box, Dropbox, and Zendesk.

Barracuda is an email protection solution designed to safeguard businesses from threats like phishing, malware, and email-based attacks. It caters to organizations of all sizes, offering comprehensive data loss prevention and threat protection. 

Why I picked Barracuda: It focuses on data loss prevention, making it ideal for businesses that need to protect sensitive information. Barracuda's advanced threat protection identifies and blocks sophisticated threats. Its email encryption ensures that your sensitive data remains secure. Additionally, the easy-to-use interface allows you to manage settings without extensive IT knowledge.

Standout features & integrations:

Features include email encryption that secures sensitive information from unauthorized access. The solution provides advanced threat protection to identify and block sophisticated email threats. Data archiving ensures compliance and easy access to important communications.

Integrations include Microsoft 365, Google Workspace, Microsoft Exchange, Outlook, Salesforce, Slack, Box, Dropbox, ServiceNow, and Zendesk.

Hornetsecurity Email Security is a cloud-based solution designed to protect businesses from email threats like spam, malware, and phishing. It caters to organizations of all sizes, providing comprehensive email filtering and advanced threat protection.

Why I picked Hornetsecurity Email Security: Its focus on spam filtering makes it effective for organizations dealing with high volumes of unwanted emails. The spam filter uses multiple layers of detection to block unwanted messages. Advanced threat protection identifies and neutralizes threats before they reach your inbox. The easy-to-use interface allows your team to manage email security without extensive training.

Standout features & integrations:

Features include real-time threat detection that identifies and neutralizes threats as they emerge. The solution offers email archiving to ensure compliance and data retention. A user-friendly dashboard provides insights into email security status and threat reports.

Integrations include Microsoft 365, Google Workspace, Microsoft Exchange, Outlook, Lotus Notes, Zimbra, IBM Domino, Kerio Connect, Slack, and Salesforce.

Vade is an email security solution that uses AI to protect businesses from email threats like phishing, malware, and spear-phishing attacks. It serves organizations looking for advanced threat detection and protection. 

Why I picked Vade: It specializes in AI threat detection, offering real-time protection against evolving threats. Vade's AI engine analyzes email content and context to identify potential threats before they reach your team. The solution includes predictive email defense, which adapts to new threats as they emerge. This makes it a strong choice for businesses that need proactive security measures.

Standout features & integrations:

Features include predictive email defense that anticipates and neutralizes threats before they impact your business. The solution provides real-time threat detection to identify and block malicious emails. Vade also offers spear-phishing protection, safeguarding your team from targeted attacks.

Integrations include Microsoft 365, Google Workspace, Microsoft Exchange, Outlook, Salesforce, Slack, Box, Dropbox, Zendesk, and ServiceNow.