Cut Noise, Stop Threats, Keep the Mail Flowing
Block What Users Shouldn’t See
Reduce spam and phishing drastically with multi‑layer filtering: reputation/RBL checks, sender authentication, content heuristics, and attachment rules.
Protect Your Sending Reputation
Outbound filtering prevents compromised accounts from sending spam. Enforce DKIM/DMARC/SPF and rate‑limit anomalies.
Simple for Users & Admins
End‑users get daily/instant digest emails to release/whitelist with one click. Admins get domain policies, logs and APIs.
Deploy in 20–40 Minutes — No Mailbox Migration
All SpectraCloud VPS instances run from Tier-III & Tier-IV certified datacenters in India. This ensures enterprise reliability, fault tolerance, and compliance with Indian data regulations.
Point MX records to SpectraCloud Anti‑Spam Gateway
Verify domain (DNS TXT) and sync users via import/API.
Set policies for inbound/outbound, attachments, geoblocks, and auth failures.
Enable digests so users can self‑release and allowlist safely.
Monitor logs and tune thresholds in the first week.
Need help? Our team can perform the MX cutover and policy tuning for you.
Per-Domain Pricing (up to 500 users)
Incoming Filtration
Eliminate spam and viruses before they reach your network.
- Inbound spam, phishing & malware filtering
- Quarantine portal & user digests
- SPF/DKIM/DMARC checks
Outgoing Filtration
Prevent spam or malware from unknowingly leaving your network
- Outbound filtering & rate limiting
- Authentication enforcement
- Alerting & reputation protection
In & Out Filtration
Best protection for both incoming and outgoing mail.
- All features of Incoming & Outgoing
- Unified policies & reporting
- Best value for most domains
Per-domain licensing covers up to 500 email users per domain. Prices indicative; GST additional as applicable.
Everything You Need for Clean, Safe Email
Inbound Filtering
RBL/URI reputation, SPF/DKIM/DMARC checks, header analysis, content heuristics, MIME & attachment controls, geo/country blocks, and custom policies.
Outbound Filtering
Stops spam & data leakage from hacked accounts. Rate-limiting, content/attachment rules, enforced authentication, and alerting.
Quarantine & User Digest
Self-service web portal and scheduled digest emails. One-click release/allowlist/denylist. Admin override & audit trail.
Authentication & Policy
Domain-wide SPF alignment checks, DKIM verification, DMARC policy alignment, and per-group/tenant rules. Tag or reject failures.
Attachment & Link Defense
Block risky file types (e.g., EXE, JS, VBS), large attachments, and suspicious short links. Optional sandboxing integration.
Continuity Mode
If your email host is down, queue mail and keep a webmail fallback so users can send/receive during outages.
Logs & Reporting
Message trace, reason codes, disposition (accepted/quarantined/rejected), top senders, top blocks, and export to CSV/JSON.
Admin & API
Multi-tenant console for partners. REST API to sync users, policies, and export logs to SIEM.
Easy Integration
Works with Microsoft 365, Google Workspace, cPanel/WHM, Plesk, Postfix/Exim, Zimbra, and custom SMTP gateways.
We do not alter your existing mailboxes. The gateway sits in front of your mail server (MX change) and filters mail before delivery.
Works with Your Current Email Platform
Connector‑based routing, accepted domains, and safe mail flow with Hybrid/Exchange Online.
Inbound gateway, accepted senders, and DMARC alignment best practices.
MX change with smart‑host outbound relay. Header rewrites optional.
SMTP relay integration with TLS and authentication. Outbound rate limits.
Per‑domain routing, policy sets, and API‑driven user sync.
SPF include, DKIM keys, and DMARC policy guidance. BIMI guidance optional.
Threats We Catch Before Inbox
| Threat | How We Handle It | Policy Options |
|---|---|---|
| Spam & bulk | RBL, Bayesian/content heuristics, bulk scoring | Tag subject, quarantine, or reject |
| Phishing & spoofing | SPF/DKIM/DMARC alignment, display‑name checks | Quarantine or hard reject on fails |
| Malware attachments | Signature & heuristic scan; block risky file types | Strip/block, quarantine, notify admin |
| Suspicious links | URL reputation & short‑link expansion | Rewrite, tag, or quarantine |
| Compromised accounts (outbound) | Rate‑limit, auth enforcement, content checks | Auto‑block sender, alert admin |
Looking for an Anti-Spam Gateway in India?
Common searches: anti spam gateway India, email security gateway, inbound outbound email filtering, spam filter for cPanel, Office 365 spam protection, Google Workspace spam filter, DMARC enforcement India, email quarantine digest. SpectraCloud provides a cloud-based, policy-driven solution that integrates with your current email host—no mailbox migration required.
Designed for the Email Setups Most Businesses Use
SMEs & Mid-Market
Microsoft 365 or Google Workspace with mixed forwarding rules and external aliases that need policy‑driven protection.
ISPs & MSPs
cPanel/WHM or Plesk hosting environments needing centralized filtering and multi‑tenant control.
Enterprises
Hybrid Exchange, multiple domains, and outbound reputation protection to safeguard brand and deliverability.
Feature Comparison
| Capability | Incoming | Outgoing | In & Out |
|---|---|---|---|
| Inbound spam & phishing filter | Yes | — | Yes |
| Outbound spam & data‑leak filter | — | Yes | Yes |
| Quarantine portal & user digests | Yes | — | Yes |
| SPF/DKIM/DMARC checks | Yes | Yes | Yes |
| Attachment & link controls | Yes | Yes | Yes |
| Geo/country blocks | Yes | Yes | Yes |
| Continuity mode (queue + webmail) | Optional | Optional | Optional |
| Logs, exports, and API | Yes | Yes | Yes |
Quick Start Guides
Microsoft 365 (Exchange Online)
- Add or update MX to point to SpectraCloud gateway.
- Create connectors for inbound and outbound as advised.
- Set accepted domains and safe mail‑flow rules.
- Publish/align SPF (include gateway), DKIM keys, and DMARC policy.
- Enable user digests and test quarantine/release.
Google Workspace
- Point MX to SpectraCloud gateway.
- Configure inbound gateway and accepted senders in Admin Console.
- Publish/align SPF, enable DKIM signing, and set a DMARC policy.
- Turn on user digests and test allowlist/denylist.
- Review logs and adjust policy thresholds.
Pre-Go-Live Checklist
- Domains verified and MX updated
- SPF include added; DKIM keys published; DMARC policy set
- Inbound and/or outbound policies enabled
- User import/API sync completed
- Digest schedule configured and tested
- Admin access and audit logging verified
Everything You Need for Clean, Safe Email
Data Handling
Mail is inspected transiently for policy decisions; quarantine retains only policy-matched messages. Retention is configurable.
Access Controls
Role-based access for admins; user actions are audited. Optional SSO available.
Standards Alignment
SelBest-practice controls aligned with email security guidance and authentication standards; reports for audits available on request.
Practical Outcomes You Can Expect
Customer Snapshots
Retail brand (300 mailboxes)
Blocked 96% junk mail within first week; reduced phishing clicks by 82%; enabled DMARC reject in 30 days.
Hospital group (5 domains)
Segmented policies by department; enforced attachment restrictions; zero ransomware via email over 9 months.
MSP partner
Onboarded 18 client domains through multi-tenant console; unified reporting across tenants.
Frequently Asked Questions — Anti-Spam Gateway
No. The gateway filters mail before it reaches your existing mail server or Microsoft 365/Google Workspace. Your mailboxes stay where they are.
Each user gets a self‑service web portal and scheduled digest emails to release, allowlist, or denylist messages with one click.
Yes. Outbound filtering helps stop spam from compromised accounts, protects domain reputation, and enforces authentication.
Yes. You can block specific file types, set size limits, and apply country/geo blocks based on policy.
We verify SPF and DKIM, check DMARC alignment, and let you choose the action: tag, quarantine, or reject.
Yes. With continuity enabled, we queue inbound messages and provide a basic webmail so users can send/receive during outages.
- Verify your domains and update MX records to point to SpectraCloud
- Add SPF include for the gateway
- Publish DKIM keys for signing
- Set an appropriate DMARC policy (none, quarantine, or reject)
- Import or sync users via API
- Configure and test quarantine digest emails
A cloud service that filters inbound and/or outbound email for spam, phishing, malware, and policy violations before delivery.
Domain‑based Message Authentication, Reporting and Conformance — a policy that tells receivers how to handle spoofed mail from your domain.
An automated email sent to users listing messages held in quarantine with one‑click release and allow/deny actions.
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