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Best Email Anti-Spam Software in 2026
Email anti-spam software helps identify unwanted or potentially harmful messages. Compare phishing detection, malware scanning, and attachment scanning, as well as supported mail platforms and deployment type. Quarantine access and retention describe additional handling details for flagged messages. Free-plan availability and paid-from pricing offer cost information to weigh against the listed capabilities. The entries include MailWasher, JetEmail, and Mailprotector. Consider which mail platforms your organization uses and what scanning and quarantine features it needs, then compare the options on those stated criteria.
- 28 apps
- Research read 23 Sept 2026
- How the order is worked out
- 1
Apache SpamAssassin
Free plan Open source APILinuxMac+2SpamAssassin offers configurable server-side spam classification with multiple detection methods and integration options.
- 2
Rspamd
Free plan Open source APILinuxMac+2Rspamd offers a self-hosted email filtering engine with multiple authentication checks, malware integrations, and custom rule options.
- 3
MailWasher
Free plan AndroidiPhoneSelf-hosted+1MailWasher focuses on screening email before it reaches a computer, with multiple filter types and support for common email services and programs.
- 4
- 5
Mailprotector
Free plan APIWebMailprotector brings filtering, encryption, and archiving products together for MSPs. Check Shield's Microsoft 365 limitation and request product pricing before choosing.
- 6
SPAMfighter
Free plan AndroidExtensioniPhone+3SPAMfighter lists multiple protections and support for several mail programs, with a separate Mail Gateway option for SMTP and mail-server platforms.
- 7
MX Guarddog
Free plan WebMX Guarddog offers hosted filtering and outage mail holding for standard SMTP servers on owned domains. Check the per-address monthly charge and seven-day quarantine retention when considering it.
- 8
Libraesva Email Security
Free trial Self-hostedWebLibraesva Email Security combines message, attachment, URL, and account-takeover protections with both self-hosted and web options. Buyers need to request pricing, while a 30-day trial is available.
- 9
Cisco Catalyst Center
Paid APILinuxMac+3 - 10
Cleanmail
Free trial Self-hostedWebCleanmail combines threat filtering with outbound scanning, message archiving, and emergency webmail.
- 11
Mailinblack Protect
Paid APISelf-hostedWebMailinblack Protect combines inbound email filtering with link analysis and administrative controls, with deployment choices for different environments.
- 12
SpamHero Business Email Security
Free trial APIWebSpamHero combines inbound filtering, quarantine, and email continuity with Microsoft 365 and Google Workspace support.
- 13
MailChannels Inbound Filtering
Paid APIWebInbound Filtering combines mail threat detection with quarantine, search, and per-domain controls for hosting providers.
- 14
Sophos Secure Message
by Sophos Secure MessageFree trial WebChoose Sophos Email if your organization needs inbox threat protection alongside email encryption and data loss prevention.
- 15
SpamTitan Gateway
Free trial Self-hostedWebSpamTitan Gateway combines mail-flow administration with spam analysis, antivirus engines, and outbound controls.
- 16
SpamSieve
Free trial MacSpamSieve is focused on filtering mail inside supported Mac applications, with local processing and customizable rules.
- 17
Symantec IT Management Suite
Paid APILinuxMac+3Choose Symantec IT Management Suite if you need cloud-based management across Windows, macOS, and Linux with patching, deployment, and security controls.
- 18
Zerospam
Free trial WebZerospam filters mail before delivery and provides administrators with quarantine controls.
- 19
Barracuda Message Archiver
Paid MacWebWindows - 20
Vade for Microsoft 365
Paid WebChoose Vade for Microsoft 365 if you are an MSP seeking Microsoft 365 threat detection and remediation across client tenants, with contextual training and security log integrations.
- 21
Proxmox Mail Gateway
Paid LinuxWebProxmox Mail Gateway combines outbound filtering with a consistent stated feature set across four annual support tiers. The key choice is the level of support and response time required.
- 22
Cisco Meraki Dashboard
Paid Web - 23
Forcepoint Email Security Cloud
Paid Web - 24
Mimecast Email Security
Paid Web - 25
N-able Mail Assure
Paid Web
#1Places #1, #2, #3, #4, #5 on this list can be bought by the makers of the software on it. See the price
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