Best Email Anti-Spam Software in 2026
Updated
In short: MailWasher is ranked #1 of 26 as of 4 October 2026, ahead of JetEmail and Mailprotector. 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 is intended to help manage unwanted or potentially harmful email. Compare phishing detection, malware scanning, and attachment scanning, as well as deployment type and supported mail platforms. Quarantine access and retention are additional factors, while free-plan availability and paid-from pricing help frame cost. MailWasher and Proxmox Backup Server start the ranking, followed by JetEmail and MX Guarddog. SPAMfighter, Rspamd, Mimecast Data Leak Prevention, and Retarus Transactional Email also appear among the early entries. Compare the listed scanning, quarantine, and platform details with the needs of your email environment.
26 email anti-spam software ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
3 of the 25 here have a free tier you can use, 0 have open-source code on record, and 0 have full bars: free, open, on most of your devices and documented.
| # | App | Signal | Free tier | Open code | Devices | From | Score |
|---|---|---|---|---|---|---|---|
| 1 | MailWasherWindows · Android · iPhone | Three bars | — | 3 of 6 | $4.16/mo | 6.6 | |
| 2 | JetEmailWeb | Two bars | — | 1 of 6 | $29/mo | 6.4 | |
| 3 | MailprotectorWeb · API | Two bars | — | 1 of 6 | Free | 6.3 | |
| 4 | CleanmailWeb · Self-hosted | One bar | — | — | 1 of 6 | — | 5.5 |
| 5 | Mimecast Data Leak PreventionWeb | One bar | — | — | 1 of 6 | — | 5.5 |
| 6 | Proxmox Backup ServerWeb · Linux | One bar | — | — | 2 of 6 | €46.67/mo | 5.5 |
| 7 | Retarus Transactional EmailWeb · API | One bar | — | — | 1 of 6 | — | 5.5 |
| 8 | Mailinblack ProtectWeb · Self-hosted · API | One bar | — | — | 1 of 6 | — | 5.4 |
| 9 | MX GuarddogWeb | One bar | — | — | 1 of 6 | $0.25/mo | 5.4 |
| 10 | Vade for Microsoft 365Web | One bar | — | — | 1 of 6 | — | 5.4 |
| 11 | SPAMfighterWindows | One bar | — | — | 1 of 6 | — | 5.3 |
| 12 | Forcepoint Email Security CloudWeb | One bar | — | — | 1 of 6 | — | 5.2 |
| 13 | Forcepoint ZTNAWeb · Windows · Mac · Self-hosted | Two bars | — | — | 3 of 6 | — | 5.2 |
| 14 | MailChannels Inbound FilteringWeb | No signal | — | — | 1 of 6 | — | 5.2 |
| 15 | NoSpamProxyWeb | No signal | — | — | 1 of 6 | — | 5.2 |
| 16 | Sophos Secure MessageNo platforms listed | One bar | — | — | 0 of 6 | — | 5.2 |
| 17 | Symantec IT Management SuiteWindows · Mac · Linux | One bar | — | — | 3 of 6 | — | 5.2 |
| 18 | Apache SpamAssassinNo platforms listed | No signal | — | — | 0 of 6 | — | 5.1 |
| 19 | RspamdMac · Linux | No signal | — | — | 2 of 6 | — | 5.1 |
| 20 | Proxmox Mail GatewayWeb · Linux | One bar | — | — | 2 of 6 | €15.83/mo | 5.0 |
| 21 | SpamTitan GatewayWeb · Self-hosted | One bar | — | — | 1 of 6 | — | 5.0 |
| 22 | Libraesva Email SecurityWeb · Self-hosted | One bar | — | — | 1 of 6 | — | 4.9 |
| 23 | SpamSieveMac | No signal | — | — | 1 of 6 | — | 4.8 |
| 24 | ZerospamWeb | No signal | — | — | 1 of 6 | — | 4.8 |
| 25 | N-able Mail AssureWeb | No signal | — | — | 1 of 6 | — | 4.6 |
Is your app 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 Freedom251?
MailWasher is ranked #1 of 26 with a score of 6.6. JetEmail is second and Mailprotector 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 free-and-open first: a usable free tier and open-source code, then the platforms it runs on and its documentation. Paid placements never change a rank.