Best Retarus Email Security Alternatives in 2026
The top Retarus Email Security alternatives are Barracuda Message Archiver, Symantec IT Management Suite and MX Guarddog: 15 email Anti-Spam software our editors would look at instead of Retarus Email Security, in our ranking order.
Retarus Email Security: A forensic-focused email gateway for organizations managing complex or hybrid mail systems. Where it falls short: pricing requires a sales conversation rather than a published plan table.
Switching from Retarus Email Security? For most email anti-spam software buyers the best Retarus Email Security alternative is Barracuda Message Archiver, built for organizations needing email archiving, not filtering. On a budget, JetEmail starts at $29/mo. MX Guarddog has a free plan. Forcepoint Email Security Cloud offers the most quarantine retention (30 days).
Why People Look for a Retarus Email Security Alternative
- Pricing requires a sales conversation rather than a published plan table
- Quarantine retention is 30 days by default
- Cloud-gateway deployment may not suit every email architecture
Quick Picks by What You Need
- Best overallBarracuda Message Archiver9.4
Organizations needing email archiving, not filtering
Visit Barracuda Message Archiver - Lowest priceJetEmail7.9
Paid plans from $29/mo
Visit JetEmail - Best free optionMX Guarddog8.7
Has a free plan
Visit MX Guarddog - Most quarantine retentionForcepoint Email Security Cloud7.9
30 days
Visit Forcepoint Email Security Cloud
All 15 Retarus Email Security Alternatives, Ranked
Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.
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Best forOrganizations needing email archiving, not filtering
- Better than Retarus Email Security:
- Editor score 9.4 vs 7.0
A strong email archive for compliance workflows, but not a primary anti-spam filter.
9.4/10★★★★★Visit Barracuda -
Best forIT teams managing endpoint software and patches
- Better than Retarus Email Security:
- Editor score 9.3 vs 7.0
A broad endpoint management suite, but not a focused email anti-spam product.
9.3/10★★★★★Contact Broadcom -
Best forBudget-conscious domain owners
- Better than Retarus Email Security:
- Editor score 8.7 vs 7.0
A low-cost cloud gateway for domain owners who run their own email servers.
- Phishing detection
- Malware scanning
8.7/10★★★★☆Visit MX Guarddog -
Best forMSPs managing multiple protected mail environments
- Better than Retarus Email Security:
- Editor score 8.6 vs 7.0
A broad, MSP-focused email security service with filtering, continuity, archiving, and multitenant control.
8.6/10★★★★☆Visit N-able -
Best forBusinesses needing cloud gateway sandboxing
- Better than Retarus Email Security:
- Editor score 7.9 vs 7.0
A cloud gateway combining email filtering, sandboxing, quarantine and routing controls.
- Attachment scanning
- Phishing detection
- Malware scanning
7.9/10★★★★☆Visit Forcepoint -
Best forEnterprises wanting mature secure email infrastructure
- Better than Retarus Email Security:
- Editor score 7.9 vs 7.0
A broad email-security suite for organizations protecting complex mail environments.
- Attachment scanning
- Phishing detection
- Malware scanning
7.9/10★★★★☆Visit Mimecast -
Best forTechnical teams building programmable filtering
- Better than Retarus Email Security:
- Editor score 7.9 vs 7.0
A configurable gateway for teams building spam, phishing, and malware controls.
7.9/10★★★★☆Visit Rspamd -
Best forSelf-hosted teams wanting a full mail gateway
- Better than Retarus Email Security:
- Editor score 7.9 vs 7.0
A full mail gateway for teams that want self-hosted scanning, rules, quarantine, and logs.
7.9/10★★★★☆Visit Proxmox -
Best forOrganizations needing broad, modern email protection
- Better than Retarus Email Security:
- Editor score 7.9 vs 7.0
Broad cloud email protection spanning phishing, malware, impersonation, DLP, and encryption.
7.9/10★★★★☆Visit Sophos Email -
Best forTeams needing email marketing with basic delivery tools
- Better than Retarus Email Security:
- Editor score 7.9 vs 7.0
A flexible email marketing platform with basic delivery tools, not a dedicated anti-spam product.
7.9/10★★★★☆Visit JetEmail -
Best forMicrosoft-centric hybrid email environments
- Better than Retarus Email Security:
- Editor score 7.9 vs 7.0
A flexible email gateway for Microsoft and SMTP environments, with filtering, encryption and routing controls.
- Attachment scanning
- Phishing detection
- Malware scanning
7.9/10★★★★☆Visit NoSpamProxy -
Best forMulti-domain providers using cPanel or WHM
- Better than Retarus Email Security:
- Editor score 7.9 vs 7.0
A focused cloud gateway for multi-domain email protection through cPanel and WHM.
- Phishing detection
- Malware scanning
7.9/10★★★★☆Visit MailChannels -
Best forHybrid environments needing advanced threat detection
- Better than Retarus Email Security:
- Editor score 7.8 vs 7.0
A broad email security gateway for hybrid teams that need layered threat detection.
7.8/10★★★★☆Visit Libraesva -
Best forMac users wanting local Bayesian filtering
- Better than Retarus Email Security:
- Editor score 7.8 vs 7.0
A focused local Bayesian filter for Mac users who want detailed mail controls.
- Attachment scanning
7.8/10★★★★☆Visit SpamSieve -
Best forBusinesses needing two-way filtering and continuity
- Better than Retarus Email Security:
- Editor score 7.1 vs 7.0
A two-way email gateway with continuity, quarantine, archiving, and outbound controls.
- Phishing detection
- Malware scanning
7.1/10★★★★☆Visit Alinto
Retarus Email Security Alternatives: Common Questions
What is the best alternative to Retarus Email Security?
Barracuda Message Archiver: #1 in our Email Anti-Spam Software ranking, with an editor score of 9.4 out of 10. A strong email archive for compliance workflows, but not a primary anti-spam filter.
Is there a free alternative to Retarus Email Security?
Yes. MX Guarddog, Rspamd and JetEmail have a free plan or a free tier.
Why do people look for Retarus Email Security alternatives?
Pricing requires a sales conversation rather than a published plan table; Quarantine retention is 30 days by default; Cloud-gateway deployment may not suit every email architecture.
Which Retarus Email Security alternative has the most quarantine retention?
Forcepoint Email Security Cloud, with 30 days.
How do I switch from Retarus Email Security?
Export your data from Retarus Email Security (most tools have an export in their settings). Sign up for the alternative; start on its free plan or trial if it has one. Import your export and set up the integrations your team relies on. Run both side by side for a short while, then cancel Retarus Email Security.
How to Switch from Retarus Email Security
- Export your data from Retarus Email Security (most tools have an export in their settings).
- Sign up for the alternative; start on its free plan or trial if it has one.
- Import your export and set up the integrations your team relies on.
- Run both side by side for a short while, then cancel Retarus Email Security.
Retarus Email Security vs Each Alternative
| # | Tool | Free plan | Paid from | Malware scanning | Supported mail platforms | Score |
|---|---|---|---|---|---|---|
| 16 | Retarus Email Security | Yes | Microsoft 365; existing email systems and mail servers | 7.0 | ||
| 1 | Barracuda Message Archiver | No | 9.4 | |||
| 2 | Symantec IT Management Suite | 9.3 | ||||
| 3 | MX Guarddog | Yes | $0.25/unit/mo | Yes | Standard SMTP email servers for owned domains; not consumer Gmail or Hotmail accounts | 8.7 |
| 4 | N-able Mail Assure | No | 8.6 | |||
| 5 | Forcepoint Email Security Cloud | Yes | Microsoft Exchange, Gmail for Business, and other email providers | 7.9 | ||
| 6 | Mimecast Email Security | No | Yes | Microsoft 365, Google Workspace, on-premises and hybrid email | 7.9 | |
| 7 | Rspamd | Yes | £100/mo | 7.9 | ||
| 8 | Proxmox Mail Gateway | No | €190/yr | 7.9 | ||
| 9 | Sophos Email | No | 7.9 | |||
| 10 | JetEmail | Yes | $29/mo | 7.9 | ||
| 11 | NoSpamProxy | Yes | Microsoft 365, Microsoft Exchange and SMTP mail servers | 7.9 | ||
| 12 | MailChannels Inbound Filtering | Yes | Downstream SMTP mail servers; cPanel/WHM | 7.9 | ||
| 13 | Libraesva Email Security | No | 7.8 | |||
| 14 | SpamSieve | No | $39.99 one-time | No | Apple Mail, Airmail, GyazMail, MailMate, MailMaven, legacy Outlook, Entourage, MailForge, Mailsmith, Postbox, and PowerMail | 7.8 |
| 15 | Cleanmail | Yes | Professional mail servers and any email platform | 7.1 |
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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