Transparent Filtering

MailChannels Transparent Filtering is carrier-grade software that provides a fully transparent way to block the delivery of spam from your network to the Internet. It is designed to make email abuse management easier for telcos, dedicated and VPS hosting providers.

Product Details

Technical Brief

Intro to ResponseAnalytics™. SMTP responses for valuable insights.

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White Paper

The Hidden Cost of IP Blacklisting

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Case Study

Read how Hostwinds earned a "no-SPAM tolerance network" designation from Spamhaus.

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Protect your entire network

Use MailChannels Transparent Filtering to analyze all outgoing SMTP traffic from your customer base without configuration changes. You can filter mail coming from servers, subscribers, scripts, and devices and achieve a blacklist-free network.

Detect compromised accounts

You can identify and shut down hacked user accounts and scripts, and stop spammer-controlled servers in seconds before they damage your IP address reputation and cause blacklisting or delivery problems for all of your users.

Complete control over policy

Express complex mail handling policies using familiar JavaScript code. Pull in and process data in real-time from external SQL and LDAP servers, web services and DNS. Store scripts in a git repository or edit online using a built-in IDE optimized for policy development.

Improve your email reputation

You can use Transparent Filtering to build a solid reputation and avoid deliverability problems. Use intelligent IP address allocation, apply rate limits, and monitor delivery rates.

Scalable and Fault Tolerant

MailChannels Transparent Filtering is a carrier-grade solution for processing mail for up to 10,000 servers or 10 million end users on one server. Real-time peer-to-peer clustering means no single points of failure. Take down machines at anytime without delaying a single message.

Centralized Intelligence

You can diagnose email delivery issues using a powerful built-in log search. Analyze terabytes of mail delivery logs spanning thousands of servers using a powerful query language. Ship logs to Elasticsearch, Splunk, Hadoop or Amazon Redshift for deeper investigation.

Integrated Solutions

Send automated notifications to system administrators and abuse team members. Call webhooks to automate remediation. Access your customers settings and data from native data stores (LDAP, SQL).

Use Cases

Dedicated and VPS Hosting Providers

Transparent Filtering works in conjunction with your routers. The routers are configured using Policy Based Routing (PBR) to redirect outgoing port 25 traffic from the network to the MailChannels server. With MailChannels Transparent Filtering, you can intercept the outgoing SMTP connections, analyze them, and forward them to the intended destination without modifying the source IP address. The mail will appear to be coming from each individual VPS or dedicated server, and your customers don't know that their mail is being filtered.

Internet Service Providers

For ISP Networks, MailChannels integrates with RADIUS to track users as they move between IP addresses. Rate limits and other abuse management policies follow users from IP to IP without skipping a beat.

Transparent Filtering Pricing

MailChannels Transparent Filtering relieves service providers of the cost and complexity of managing email abuse and IP address reputation.

With MailChannels, you only pay for what you use. You are billed on a monthly basis, and discounts are available for long term commitments.

Getting Started with Transparent Filtering

System Requirements

You will need a server with at least eight processor cores and 32GB of RAM to process 30 million messages per hour with connection bursts greater than 10,000 SMTP connections per second:

  • 8 x 64-bit Intel or AMD CPU cores
  • 32 GB RAM
  • 1 x 1000BASE-T NIC
  • 500 GB SSD disk delivering > 50K IOPS

Depending on the quantity of logs you want to store, the policy features you need to use, and other considerations, your storage requirements may exceed the amount specified above.

Transparent Filtering is designed for Linux kernel 2.6.32 and higher, and is certified to work with Ubuntu 12.04 LTS 64-bit, Ubuntu 14.04 LTS 64-bit, and RedHat Enterprise Linux 6 (or CentOS). Compatibility with other Linux distributions is not officially supported by MailChannels.

To use MailChannels Transparent Filtering:

  1. Contact us to request a demo.
  2. Provision a Linux virtual machine or dedicated server.
  3. Configure your routers for Policy Based Routing.
  4. Set up initial email policies.
  5. Start sending traffic.

Protect your IP reputation to prevent listings on Spamhaus, SpamCop, Compromised Blocklist (CBL), UCEPROTECT, SenderBase, and others.

Learn what MailChannels can do for you