Mimecast Email Security vs Proxmox Mail Gateway

Mimecast Email Security7.9Visit Proxmox Mail Gateway7.9Visit

Mimecast Email Security #6 in Email Anti-Spam Software 7.9/10 Pricing on request · 30-day trial Free trial✓ 3 of 3 features Visit Mimecast

vs

Proxmox Mail Gateway #8 in Email Anti-Spam Software 7.9/10 Open source ✓ 0 of 3 features Visit Proxmox

• Mimecast Email Security fits best

  Enterprises wanting mature secure email infrastructure

• Proxmox Mail Gateway fits best

  Self-hosted teams wanting a full mail gateway

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Side by side

Feature	Mimecast Email Security 7.9/10 Visit ↗	Proxmox Mail Gateway 7.9/10 Visit ↗
At a glance
Editor score	7.9	7.9
Ranking	#6 in Email Anti-Spam Software	#8 in Email Anti-Spam Software
Best for	Enterprises wanting mature secure email infrastructure	Self-hosted teams wanting a full mail gateway
Pricing model	Paid	Paid
Starting price	—	€190/yr
Free plan	—	—
Free trial	30 days	—
Deployment	Cloud	Cloud, Desktop, Self-hosted
Platforms	Web	Web, Linux
Integrations	300+ integrations	5 integrations
Features Mimecast Email Security 3/3 · Proxmox Mail Gateway 0/3
Phishing detection	✓ (best)	Not checked yet
Malware scanning	✓ (best)	Not checked yet
Attachment scanning	✓ (best)	Not checked yet
Specs
Quarantine access	User_and_admin	Not checked yet
Supported mail platforms	Microsoft 365, Google Workspace, on-premises and hybrid email	Not checked yet
Quarantine retention	Not checked yet	Not checked yet
Deployment type	Cloud_gateway	Not checked yet
Our review
Pros	AI detection covers phishing, BEC, anomalies, malicious URLs, and attachments Supports Microsoft 365, Google Workspace, on-premises, and hybrid email Integrates with CrowdStrike, Okta, Splunk, and Microsoft Sentinel	Scans inbound and outbound mail with SpamAssassin and ClamAV Extensive SMTP filtering, policy rules, quarantine, and mail actions Includes tracking, unified logs, clustering, web, CLI, and API administration
Cons	Pricing requires contacting sales No perpetual free plan is offered Plan differences require comparing continuity, backup, and collaboration features	Requires gateway deployment between the firewall and internal mail server Annual subscriptions are priced per host, starting at €190 Support depth varies substantially by subscription tier
Our verdict	Mimecast Email Security is a cloud-based email protection service for organizations using Microsoft 365, Google Workspace, on-premises, or hybrid email. It targets teams that need centralized controls for phishing, business email… Read the review →	Proxmox Mail Gateway is an open-source mail proxy for organizations that need to inspect and control inbound and outbound email. It sits between a firewall and an internal mail server, analyzing traffic for spam, viruses, Trojans,… Read the review →

Strengths and trade-offs

• Mimecast Email Security — where it wins

  • AI detection covers phishing, BEC, anomalies, malicious URLs, and attachments
  • Supports Microsoft 365, Google Workspace, on-premises, and hybrid email
  • Integrates with CrowdStrike, Okta, Splunk, and Microsoft Sentinel

  Where it doesn't

  • Pricing requires contacting sales
  • No perpetual free plan is offered
  • Plan differences require comparing continuity, backup, and collaboration features

• Proxmox Mail Gateway — where it wins

  • Scans inbound and outbound mail with SpamAssassin and ClamAV
  • Extensive SMTP filtering, policy rules, quarantine, and mail actions
  • Includes tracking, unified logs, clustering, web, CLI, and API administration

  Where it doesn't

  • Requires gateway deployment between the firewall and internal mail server
  • Annual subscriptions are priced per host, starting at €190
  • Support depth varies substantially by subscription tier

• Mimecast Email Security7.9/10 · Pricing on request · 30-day trial

  A broad email-security suite for organizations protecting complex mail environments.

  Visit MimecastFull verdict →
• Proxmox Mail Gateway7.9/10 · Open source

  A full mail gateway for teams that want self-hosted scanning, rules, quarantine, and logs.

  Visit ProxmoxFull verdict →