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SmarterTools SmarterMail is a commercial email security platforms tool by smartertools. MailGuard is a commercial email security platforms tool by MailGuard. Compare features, ratings, integrations, and community reviews side by side to find the best email security platforms fit for your security stack.
CST VerdictBased on our analysis of NIST CSF 2.0 coverage, core features, integrations, company size fit, here is our conclusion:
SMB and mid-market teams running on-premises mail infrastructure will get the most from SmarterTools SmarterMail because it bundles server-grade antispam and antivirus without forcing you into a cloud-dependent architecture or per-seat licensing. The multi-level filtering (server, domain, user) with Rspamd and ClamAV integration handles the spam volume that defeats simpler gateways, and the authentication stack (SPF, DKIM, DMARC) covers NIST PR.AA and PR.DS requirements without separate tools. Skip this if your organization is already committed to cloud email or needs centralized threat hunting across hundreds of mailboxes; SmarterMail's strength is containment at the perimeter, not detection and response infrastructure.
Mid-market and SMB security teams will get real value from MailGuard's outbound DLP and policy enforcement, which most cloud email filters treat as an afterthought. The file fingerprinting and regex pattern matching actually catch data exfiltration attempts that keyword-only solutions miss, and the tool covers both inbound filtering and compliance controls without forcing separate deployments. Skip this if you need native SIEM integration or advanced threat hunting; MailGuard prioritizes blocking and prevention over post-breach investigation, which is fine if your detection happens elsewhere.
Email server with antispam, antivirus, and security features for Linux/Windows
Cloud-based managed email filtering against phishing, ransomware & BEC.
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Common questions about comparing SmarterTools SmarterMail vs MailGuard for your email security platforms needs.
SmarterTools SmarterMail: Email server with antispam, antivirus, and security features for Linux/Windows. built by smartertools. headquartered in United States. Core capabilities include SpamAssassin-based pattern matching for spam detection, Rspamd support including remote server integration, ClamAV antivirus with self-updating virus protection..
MailGuard: Cloud-based managed email filtering against phishing, ransomware & BEC. built by MailGuard. headquartered in Australia. Core capabilities include Inbound and outbound email filtering via MX record change, Anti-spam engines using heuristic filters, ML, and generative AI, Virus, malware, and blended threat protection with archive unpacking and MIME-type detection..
Both serve the Email Security Platforms market but differ in approach, feature depth, and target audience.
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