Best Spamhaus Policy Blocklist (PBL) Alternatives & Competitors in 2026

Cybonet Outbound Spam Guard (OSG)

Carrier-grade outbound spam & botnet detection solution for ISPs.

Abusix Email Threat Protection

Real-time email threat blocking via RBL/DNSBL blocklists for mail servers.

MailChannels cPanel Plugin

cPanel/WHM plugin for provisioning MailChannels email security for hosting customers.

MailChannels Outbound Filtering

Cloud SMTP relay for hosting providers to filter outbound spam & protect IP reputation.

Cloudflare Cloud Email Security

Cloudflare Cloud Email Security is a cloud-based email protection service that safeguards organizations against phishing, malware, spam, and other email-borne threats through integrated threat detection and prevention capabilities.

Trustifi AI Powered Email Security

AI-powered email security platform for threat detection and compliance

MDaemon Technologies SecurityGateway

Email security gateway protecting against spam, phishing, viruses & data leaks

MX Layer Email Security

Cloud-based email security platform with AI-powered threat detection

LevelBlue Email Security

Managed email security service protecting against email-based threats

ESET Cloud Office Security

Cloud email security for Microsoft 365 and Google Workspace applications

TitanHQ SpamTitan

Email security platform blocking spam, phishing, malware, and viruses

Bitdefender GravityZone Security for Exchange

Email security for Microsoft Exchange servers with antispam and antimalware.

Comodo Secure Email Gateway

Cloud-based email gateway with spam filtering, anti-phishing, and containment

TitanHQ Cybersecurity Bundles

Bundled cybersecurity solutions for MSPs and end users with email protection

MX Layer Outbound Email Filtering

Outbound email filtering platform for spam prevention and IP reputation mgmt

Altospam Mailsafe

Cloud-based anti-spam solution filtering inbound email threats

Trustifi Inbound Shield

AI-powered inbound email security platform for phishing & malware detection

MDaemon Technologies MDaemon ActiveSync

ActiveSync protocol implementation for MDaemon email server synchronization

MDaemon Email Server

Email server application with groupware functions for Microsoft Windows

MDaemon Technologies MDaemon Private Cloud Edition

Private cloud email server solution for organizations

MDaemon Technologies MDaemon AntiVirus

Email antivirus and antispam solution for MDaemon email servers

Cybersentriq MX Email Threat Protection

MX-based email security platform using AI to block spam, phishing & malware

Cloudmark Authority

Carrier-grade email security for ISPs blocking spam, phishing, and malware

SpamExperts Email Security

Email security platform filtering spam, phishing, and malware threats

SpamExperts Outbound Email Protection

Outbound email filtering to block spam, phishing, and malware traffic.

SpamExperts Incoming Email Filtering

Email filtering service protecting against spam, viruses, and phishing.

SmarterTools SmarterMail

Email server with antispam, antivirus, and security features for Linux/Windows

Mailinblack U-Cyber 360°

Comprehensive email security & human risk mgmt platform with AI-powered protection

Blaze Networks Blaze Screen

Managed email filtering service with threat detection and spam prevention

Cyber Cops Email Security

Cloud-based email security service protecting against phishing, malware & BEC

Svartlistcheck

Monitors domains across 100+ blacklists and alerts when domains are listed

Abusix Guardian Mail

Email threat protection using blocklists, blocking 99.6%+ of email threats.

ATG Managed Email Security

Managed cloud email security service with anti-spam, anti-phishing, and DLP.

Clearnetwork ContentCatcher

Cloud-based email security platform with DLP, encryption, and archiving.

Cybonet Mail Secure

Email security gateway with anti-spam, AV, sandboxing, and DLP.

Halon

Composable email infrastructure platform with threat detection and AI ops.

Infortech Secure Managed Business Email

Managed business email service on MailEnable with security & no per-mailbox fees.

MailGuard Email Security

Cloud-based email filtering blocking phishing, malware, spam & BEC attacks.

MailGuard

Cloud-based managed email filtering against phishing, ransomware & BEC.

PowerDMARC Hosted DMARC

Cloud-managed DMARC record hosting with DNS-free policy management.

SourcetekIT Email Security Service

Managed email security service for Office 365 using Cisco's platform.

Spam Cube

Home network security hardware device blocking spam, viruses, and phishing.

SpamTitan Cloud

Cloud email filter using block/allow lists and greylisting to reduce spam.

SpamTitan

Cloud-based anti-spam and antivirus email filtering with AI threat detection.

TitanHQ Security Bundles

Tiered cybersecurity bundles combining email, DNS, backup & SAT.

SpamTitan for Office 365

Email security layer for M365 with anti-phishing, sandboxing, and DLP.

SpamTitan Gateway

Email security gateway appliance for spam/malware filtering and mail flow control.

Vade (Hornetsecurity) 365 Total Protection

AI-powered email security platform for Microsoft 365 with backup & compliance.