Instead of Mailprotector
Mailprotector alternatives
Mailprotector is designed for managed service providers that secure organizational email. Its products include gateway filtering, Microsoft 365 API integration through Shield, MX-controlled filtering through CloudFilter, subject-triggered encryption with Bracket, and forward-looking message capture in SecureStore. Bracket requires no sender or recipient apps, plugins, or passwords, while SecureStore’s default retention is seven years. Mailprotector also provides outbound filtering, impersonation protection, Microsoft 365 and Google Workspace support, and a free Radar email security check. The main service platforms are API and web, and product pricing is available on request.
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Xeams
Free plan APILinuxMac+3Organizations needing a mail server and spam firewall — Xeams adds standalone, front-end, or hybrid mail-server operation, SMTP/POP3/IMAP support, and extensive outbound tools.
Free plan · paid from $1.67/user/mo (annual) · 30-day trial Visit site - 2
VM Backup
Free plan APILinuxSelf-hosted+1Windows virtualized server backup — VM Backup protects Windows hosts and Hyper-V, VMware, and Proxmox environments rather than securing email.
Free plan · 30-day trial Visit site - 3
Rspamd
Free plan Open source APILinuxMac+2Self-hosted Linux email security customization — Rspamd is an open-source, on-premises scoring engine with Lua rules, mail-transfer-agent integrations, and optional antivirus integrations.
Free plan · paid from £100/mo Visit site - 4
Scrollout F1
Free plan LinuxSelf-hostedWindowsFree gateway protection for multiple mail servers — Scrollout F1 is free, self-hosted gateway software supporting unlimited domains and servers under one installation.
Free plan Visit site - 5
Hermes Secure Email Gateway
Free plan Open source LinuxSelf-hostedWebSelf-hosted email security, hosting, and collaboration — Hermes combines gateway security with full mail hosting, encryption, Nextcloud collaboration, single sign-on, and multifactor authentication.
Free plan · 30-day trial Visit site - 6
MailScanner
Free plan LinuxSelf-hostedFree Linux email gateway administrators — MailScanner is free open-source Linux or Unix gateway software configured locally and paired with tools such as ClamAV and SpamAssassin.
Free plan Visit site - 7
Spamihilator
Free plan WindowsWindows users filtering POP3 or IMAP mail — Spamihilator runs between a Windows email client and the Internet, using Bayesian and customizable filters with a recoverable Recycle Bin.
Free plan Visit site - 8
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Cisco Catalyst Center
Paid APILinuxMac+3 - 10
Darktrace / EMAIL
Paid APIWeb - 11
Mailinblack Protect
Paid APISelf-hostedWeb - 12
SpamHero Business Email Security
Free trial APIWeb - 13
MailChannels Inbound Filtering
Paid APIWeb - 14
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Barracuda Message Archiver
Paid MacWebWindows - 16
Cloudflare Email Security
Paid Web - 17
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Hornetsecurity 365 Total Protection
Paid Web - 19
Forcepoint Email Security Cloud
Paid Web - 20
Mimecast Email Security
Paid Web - 21
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Symantec Email Security.cloud
Paid Web - 24
Trustifi Email Security
Paid Web - 25
VIPRE Email Security
Paid Web
An alternative may fit better if you want a free or lower-priced product, self-hosted deployment, Windows support, a complete mail server, or a desktop email filter. Shield currently centers on Microsoft 365, although CloudFilter supports other environments when you control MX records. Compare supported mail systems, deployment and administration, filtering controls, encryption, retention, hosting, and collaboration features. Also consider whether a free plan or trial is more suitable than Mailprotector’s request-based pricing and MSP-focused approach.