"The sheer volume of email we are receiving is creating performance issues."

Using Spamhaus’ email protection as the first and primary filtering solution reduces the amount of unnecessary and potentially harmful email that requires processing.

"We have an email security appliance, but its catch rates aren't great."

Our blocklists can be easily integrated into your current email protection solution. With no additional hardware required, costs are kept to a minimum. These blocklists can also be used with free open source applications like SpamAssassin and Rspamd, making our solution even more cost effective.

"Email infrastructure is becoming too costly due to the volume of spam and malicious emails being stored."

We reject spam emails at SMTP connect, so unwanted mail isn’t stored; reducing your storage costs. There is also the benefit of the sender receiving an immediate notification that their email was blocked, rather than it sitting in a junk folder unread.

Related Products

The Blocklist Tester

To ensure our DNSBLs protect your email stream, a simple tool is available called the Blocklist Tester. It’s quick and easy to use; once you have verified an email address associated with your email server, test emails are sent. These emails contain resources listed on our blocklists and should be rejected.

Once the test is complete, a full detailed report is available, and the SMTP exchange of each email sent is available to help you understand where any problems may lie in your configuration.

  • It's free to use for any Spamhaus DNSBL user
  • Multiple test scenarios - SMTP, content or both
  • Detailed test reports for troubleshooting
Access the Blocklist Tester Find out more

Data Query Service (DQS)

Spamhaus’ Data Query Service (DQS) is an affordable and effective solution to protect your email infrastructure and users.

Using your existing email protection solution, you will be able to block spam and other related threats including malware, ransomware, and phishing emails.

The service has never failed and utilizes the longest established DNSBLs in the industry.

  • Proactive & preventative
  • Save on email infrastructure & management costs
  • Actionable
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