Block 80% of spam before it even reaches your filters.
Greylisting and reputation checks stop the majority of spam at the gateway connection level. IP Four integrates global reputation databases and greylisting controls to eliminate spam before it consumes your filtering resources.
Stop spam at the connection before it enters your environment.
Reputation checks and greylisting are the most efficient spam controls available. They eliminate the majority of spam before any processing-intensive content analysis is needed.
Greylisting Controls
Unknown sending servers are temporarily rejected and asked to retry. Legitimate mail servers retry as per RFC standards. Spam bots rarely retry, eliminating a significant proportion of spam before any content analysis.
IP Reputation Scoring
Every inbound connection is scored against global IP reputation databases covering billions of known spam sources, compromised servers, and botnet nodes. Low-reputation IPs are blocked at connection.
Domain Reputation Analysis
Sending domain age, registration history, and reputation scores are evaluated for every inbound message. Newly registered domains and domains with poor sending history are flagged or blocked.
Real-Time Blocklist Integration
Integration with multiple real-time blocklists including Spamhaus, SORBS, and Barracuda. Blocklist lookups performed at connection time to block known bad actors before any processing occurs.
Reputation Feed Updates
Reputation data updated continuously from global threat intelligence feeds. New spam sources identified and added to blocklists within minutes of being detected anywhere in the world.
Reputation Reporting
Dashboards showing blocked connections by reputation category, greylisting retry rates, and top blocked sources. Identify patterns in attacks targeting your organisation.
From gateway connection to clean delivery.
Gateway Connection Analysis
We analyse your current inbound connection patterns, identifying the proportion of connections from low-reputation sources and the volume being processed unnecessarily by content filters.
Reputation Source Selection
Reputation data sources selected and configured for your organisation. Multiple blocklist feeds integrated to maximise coverage without introducing false positive risk for legitimate senders.
Greylisting Policy Configuration
Greylisting policies configured with appropriate retry windows. Whitelists created for known legitimate senders to prevent greylisting delays for business-critical correspondence.
Baseline and Tuning
Reputation controls deployed in monitoring mode. Baseline established over two weeks. False positive rate validated before enforcement. Whitelist expanded based on observed legitimate traffic.
Enforcement Activation
Reputation blocking and greylisting activated. Connection-level blocking reduces gateway load immediately. Processing resources freed for deeper analysis of traffic that passes reputation checks.
Ongoing Monitoring
Monthly reputation reports showing blocked volumes and source analysis. Whitelist management for new legitimate senders. Blocklist feed updates applied automatically as new sources are identified.
How we have helped UK businesses block spam at source.
Gateway Overloaded by Spam Connections
A Sheffield manufacturing firm had their email gateway processing over 50,000 inbound connections per day, the vast majority from known spam sources. Gateway performance was degrading during peak periods.
IP reputation blocking and greylisting deployed. Connections from known bad sources blocked at connection. Gateway load reduced by 65%. Email delivery performance improved significantly.
New Domain Spam Campaigns
A Newcastle professional services firm was being targeted by spam campaigns using newly registered domains to evade existing blocklists. Standard reputation checks were missing these sources.
Domain age and registration history checks added to reputation stack. Newly registered domain spam blocked at gateway. Campaign effectiveness against the firm reduced to near zero.
Botnet Traffic Consuming Resources
A Glasgow technology company had their email infrastructure consuming significant bandwidth and processing resources handling botnet-originated spam that was passing initial connection checks.
Botnet reputation feeds integrated. Botnet-originated connections blocked before processing. Bandwidth consumption reduced by 40%. IT team freed from managing spam-related infrastructure issues.
Stop spam at the gateway before it reaches your filters.
Our free gateway assessment shows you how much spam is reaching your filters unnecessarily and how reputation controls and greylisting can eliminate the majority before any processing occurs.