80% of spam and phishing emails originate from just 10 countries. If your business doesn't operate in these regions, why accept their email at all?
Geographic blocking is one of the most effective—and underused—email security strategies. SecZim makes it effortless.
The Geography of Cybercrime
Cybersecurity research consistently shows that email-based attacks cluster in specific regions. These aren't countries you do business with—they're countries where attackers operate with impunity.
Common high-risk origins include:
This doesn't mean everyone from these countries is malicious. But if you're a US law firm, a German manufacturer, or a UK retailer with no international operations—why take the risk?
How SecZim's Geo-Blocking Works
Every incoming email connection is checked against our IP geolocation database. The sender's country is identified in less than a millisecond. If it matches your blocked list, the connection is rejected before any data is transferred.
- MaxMind GeoIP2 database for accurate lookups
- Block by country or allow only specific countries
- Whitelist exceptions for trusted IPs
- Real-time updates, no restarts needed
Two Powerful Modes
Blocklist Mode
Block specific countries, allow everything else. Perfect for organizations that receive legitimate email from most of the world but want to block known high-risk regions.
Allowlist Mode
Allow only specific countries, block everything else. Ideal for businesses that only operate in specific regions and have no need for international email.
Real Example: US-Only Law Firm
A law firm enabled allowlist mode for US, Canada, and UK only. Result: 92% reduction in spam with zero impact on client communication. Attackers from other regions simply can't reach them.
Smart Exceptions for Legitimate Senders
Geo-blocking doesn't have to be all-or-nothing. SecZim lets you create exceptions:
- IP Whitelists: Trust specific IPs regardless of country
- Domain Whitelists: Allow emails from specific domains
- Sender Whitelists: Trust specific email addresses
Your international vendor in a blocked country? Just add their mail server to the whitelist. Problem solved, security maintained.
Why Traditional Spam Filters Miss This
Most spam filters analyze email content after it's received. They waste resources processing emails that should never have been accepted. Geographic blocking stops threats at the connection level—before your server does any work.
The SecZim Advantage
- Rejects at SMTP level, no resources wasted
- Zero content analysis needed for geo-blocks
- Attackers can't evade with content tricks
- Instant effect, no learning period
Reduce Your Attack Surface by 80%
Stop accepting email from countries you don't do business with. Geographic blocking is simple and effective.
Start Free TrialCombine with Other Protections
Geo-blocking is most effective when combined with SecZim's other security layers: SPF verification, rate limiting, reputation tracking, and auto-blacklisting. Together, they create an impenetrable defense for your Zimbra or Postfix server.
The best defense is not being a target. With geo-blocking, attackers in high-risk regions simply can't reach you.