Best Email Anti-Spam Software in 2026
Updated
In short: MailWasher is ranked #1 of 26 as of 4 October 2026, ahead of Cleanmail and Retarus Transactional Email. The best-ranked option with a free plan is JetEmail. The lowest first paid tier on this page is MX Guarddog at $0.25/mo.
Email anti-spam software helps screen unwanted or potentially harmful messages. Compared on phishing detection, malware and attachment scanning, and quarantine access and retention, the entries let you consider both message screening and review workflows. Supported mail platforms and deployment type provide details to check against your email environment. Free-plan availability and paid-from pricing add cost context. MailWasher, Cleanmail, and Retarus Transactional Email are among the options shown. Use the stated capabilities to compare how each tool handles filtering and quarantine, and whether its platform and deployment details align with the mail systems your team uses.
26 email anti-spam software ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
26ranked
3free plans on this page
$0.25/molowest paid tier
4 Oct 2026last checked
Input list Email Anti-Spam Software 25 channels on this page · 81 of 200 spec lines stated by the makers
Ch Tool Free planPaid fromPhishing detectionMalware scanningAttachment scanningQuarantine accessSupported mail platformsQuarantine retention Spec sheet Score
01 MailWasher Free planYesPaid fromnot statedPhishing detectionYesMalware scanningYesAttachment scanningnot statedQuarantine accessnot statedSupported mail platformsGmail, Outlook.com, Yahoo, AOL, Hotmail, Microsoft 365, Outlook, eM Client, Thunderbird, IMAP, POP3Quarantine retentionnot stated 4/8spec lines stated 7.7
02 Cleanmail Free plannot statedPaid fromnot statedPhishing detectionYesMalware scanningYesAttachment scanningnot statedQuarantine accessuser + adminSupported mail platformsProfessional mail servers and any email platformQuarantine retentionnot stated 4/8spec lines stated 7.0
03 Retarus Transactional Email Free plannot statedPaid fromnot statedPhishing detectionYesMalware scanningYesAttachment scanningYesQuarantine accessuser + adminSupported mail platformsMicrosoft 365; existing email systems and mail serversQuarantine retention30 days 6/8spec lines stated 7.0
04 JetEmail Free planYesPaid fromnot statedPhishing detectionnot statedMalware scanningnot statedAttachment scanningnot statedQuarantine accessnot statedSupported mail platformsnot statedQuarantine retentionnot stated 1/8spec lines stated 6.9
05 Forcepoint ZTNA Free plannot statedPaid fromnot statedPhishing detectionYesMalware scanningYesAttachment scanningYesQuarantine accessuser + adminSupported mail platformsMicrosoft Exchange, Gmail for Business, and other email providersQuarantine retention30 days 6/8spec lines stated 6.8
06 Mailprotector Free plannot statedPaid fromnot statedPhishing detectionnot statedMalware scanningnot statedAttachment scanningnot statedQuarantine accessnot statedSupported mail platformsnot statedQuarantine retentionnot stated 0/8spec lines stated 6.8
07 MX Guarddog Free planYesPaid fromnot statedPhishing detectionYesMalware scanningYesAttachment scanningnot statedQuarantine accessuser + adminSupported mail platformsStandard SMTP email servers for owned domains; not consumer Gmail or Hotmail accountsQuarantine retention7 days 6/8spec lines stated 6.8
08 Mimecast Data Leak Prevention Free planNoPaid fromnot statedPhishing detectionYesMalware scanningYesAttachment scanningYesQuarantine accessuser + adminSupported mail platformsMicrosoft 365, Google Workspace, on-premises and hybrid emailQuarantine retentionnot stated 6/8spec lines stated 6.7
09 Proxmox Backup Server Free planNoPaid fromnot statedPhishing detectionnot statedMalware scanningnot statedAttachment scanningnot statedQuarantine accessnot statedSupported mail platformsnot statedQuarantine retentionnot stated 1/8spec lines stated 6.7
10 SpamHero Business Email Security Free planNoPaid fromnot statedPhishing detectionnot statedMalware scanningnot statedAttachment scanningnot statedQuarantine accessnot statedSupported mail platformsnot statedQuarantine retentionnot stated 1/8spec lines stated 6.7
11 Zerospam Free planNoPaid fromnot statedPhishing detectionYesMalware scanningYesAttachment scanningnot statedQuarantine accessadmin onlySupported mail platformsnot statedQuarantine retentionnot stated 4/8spec lines stated 6.7
12 SpamTitan Gateway Free planNoPaid from1.95/user/moPhishing detectionnot statedMalware scanningnot statedAttachment scanningnot statedQuarantine accessnot statedSupported mail platformsnot statedQuarantine retentionnot stated 2/8spec lines stated 6.6
13 Libraesva Email Security Free planNoPaid fromnot statedPhishing detectionnot statedMalware scanningnot statedAttachment scanningnot statedQuarantine accessnot statedSupported mail platformsnot statedQuarantine retentionnot stated 1/8spec lines stated 6.5
14 Mailinblack Protect Free plannot statedPaid fromnot statedPhishing detectionYesMalware scanningYesAttachment scanningYesQuarantine accessuser + adminSupported mail platformsAll messaging systems and hosting providersQuarantine retentionnot stated 5/8spec lines stated 6.5
15 Vade for Microsoft 365 Free plannot statedPaid fromnot statedPhishing detectionYesMalware scanningYesAttachment scanningYesQuarantine accessnot statedSupported mail platformsMicrosoft 365 and OutlookQuarantine retentionnot stated 4/8spec lines stated 6.5
16 SPAMfighter Free planYesPaid fromnot statedPhishing detectionYesMalware scanningYesAttachment scanningYesQuarantine accessnot statedSupported mail platformsMicrosoft Outlook, Outlook Express, Windows Mail, Windows Live Mail (POP3), Mozilla Thunderbird; Mail Gateway supports multiple SMTP and mail-server platformsQuarantine retentionnot stated 5/8spec lines stated 6.2
17 Proxmox Mail Gateway Free planNoPaid fromnot statedPhishing detectionnot statedMalware scanningnot statedAttachment scanningnot statedQuarantine accessnot statedSupported mail platformsnot statedQuarantine retentionnot stated 1/8spec lines stated 6.1
18 Forcepoint Email Security Cloud Free plannot statedPaid fromnot statedPhishing detectionYesMalware scanningYesAttachment scanningYesQuarantine accessuser + adminSupported mail platformsMicrosoft Exchange, Gmail for Business, and other email providersQuarantine retention30 days 6/8spec lines stated 6.0
19 Sophos Secure Message Free planNoPaid fromnot statedPhishing detectionnot statedMalware scanningnot statedAttachment scanningnot statedQuarantine accessnot statedSupported mail platformsnot statedQuarantine retentionnot stated 1/8spec lines stated 6.0
20 MailChannels Inbound Filtering Free plannot statedPaid fromnot statedPhishing detectionYesMalware scanningYesAttachment scanningnot statedQuarantine accessuser + adminSupported mail platformsDownstream SMTP mail servers; cPanel/WHMQuarantine retentionnot stated 4/8spec lines stated 5.9
21 NoSpamProxy Free plannot statedPaid fromnot statedPhishing detectionYesMalware scanningYesAttachment scanningYesQuarantine accessnot statedSupported mail platformsMicrosoft 365, Microsoft Exchange and SMTP mail serversQuarantine retentionnot stated 4/8spec lines stated 5.9
22 Apache SpamAssassin Free plannot statedPaid fromnot statedPhishing detectionYesMalware scanningYesAttachment scanningYesQuarantine accessnot statedSupported mail platformsprocmail, sendmail, Postfix, qmailQuarantine retentionnot stated 4/8spec lines stated 5.6
23 SpamSieve Free planNoPaid fromnot statedPhishing detectionnot statedMalware scanningNoAttachment scanningYesQuarantine accessnot statedSupported mail platformsApple Mail, Airmail, GyazMail, MailMate, MailMaven, legacy Outlook, Entourage, MailForge, Mailsmith, Postbox, and PowerMailQuarantine retentionnot stated 4/8spec lines stated 5.6
24 Symantec IT Management Suite Free plannot statedPaid fromnot statedPhishing detectionnot statedMalware scanningnot statedAttachment scanningnot statedQuarantine accessnot statedSupported mail platformsnot statedQuarantine retentionnot stated 0/8spec lines stated 5.6
25 Rspamd Free planYesPaid fromnot statedPhishing detectionnot statedMalware scanningnot statedAttachment scanningnot statedQuarantine accessnot statedSupported mail platformsnot statedQuarantine retentionnot stated 1/8spec lines stated 5.4
Is your tool on this list?
Numbered spots on this list can be sponsored. They are labelled, and the editorial order and scores never change for payment.
Questions about this list
Which email anti-spam software is ranked first on Specifiction?
MailWasher is ranked #1 of 26 with a score of 7.7. Cleanmail is second and Retarus Transactional Email third.
How many of these have a free plan?
3 of the 25 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, MX Guarddog has the lowest first paid tier we found: $0.25/mo.
How is this list ranked?
Ranked on what each maker publishes, the fullest spec sheet first: how deeply the product is documented, the platforms it runs on, a free tier or trial to test it, and its standing. Paid placements never change a rank.
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