Email security

If you query the legacy DNSBLs via Vultr move to Spamhaus Technology’s free Data Query Service

If you are currently accessing the free legacy DNS Blocklists (DNSBLs) via the Public Mirrors, and you’re using Vultr infrastructure - you'll need to make some minor changes to your email infrastructure. The changes are easy to implement, but if you fail to do so, you could find that at some point post-May 22nd 2024, all or none of your email is blocked!

If you query the legacy DNSBLs via DigitalOcean move to Spamhaus Technology's free Data Query Service

If you are currently accessing the free DNS Blocklists (DNSBLs) via the Public Mirrors, and you’re using DigitalOcean infrastructure - you'll need to make some minor changes to your email infrastructure. The changes are easy to implement, but if you fail to do so, you could find that at some point post-February 14th 2024, all or none of your email is blocked!

Part 2 – Effective strategies against inbound malicious email: using your own data

Having looked at best practices for utilizing blocklists in the first part of this series, let’s explore the value of maximizing your own data to protect your network from malicious inbound emails. After all, your email infrastructure contains data that may only occur on your specific network.

QNAME Minimization and Spamhaus DNSBLs

On October 4th the Internet Systems Consortium (ISC) issued an article highlighting a problem with Spamhaus’ RBLDNS servers incorrectly answering partial queries that are sent due to QNAME minimization. Our technical team has deployed an initial patch for this issue, and we are in open dialogue with the ISC as...

If you query the legacy DNSBLs via OVHCloud move to Spamhaus Technology's free Data Query Service

Are you currently using the Spamhauss DNS Blocklists (DNSBLs) via OVHCloud? If you've answered "yes" to both of these questions, you need to make some changes to your email infrastructure.

Best practice for owners of a newly registered domain: PART 3

Nurture your new domain and successfully build its reputation to ensure it’s an asset for the long term, not just the next 10 minutes. Learn how in this best practice.

If you query the legacy DNSBLs via Amazon Web Services' DNS move to Spamhaus Technology's free Data Query Service

Are you currently using Spamhaus’ free DNS Blocklists (DNSBLs) and use Amazon Web Services' DNS? If you've answered "yes" to both of these questions, you need to make some changes to your email infrastructure.

Getting a Spamhaus error when using phpBB? Here’s what’s going on

If you're using phpBB and have recently started getting an error from Spamhaus, in this blog post we explain what’s going on and a simple fix.

The holiday hack – a reminder of why you shouldn’t always trust emails

Here’s a cautionary tale to anyone and everyone who uses email. The learning is simple: Always be vigilant, especially if its content asks you to provide personal information or click on links and download files.

Authentication and encryption for email

One of the first steps to ensuring good domain/IP reputation and consequently successful email deliverability is authentication and encryption - it helps receivers "trust" your email. This article provides a clear overview of what's required including SPF, DKIM and DMARC.

SERVICE UPDATE | Spamhaus DNSBL users who query via Cloudflare DNS need to make changes to email set-up

If you query our free DNSBLs and use a Cloudflare DNS resolver to make those queries, please read Spamhaus Tech’s article on moving to their free Data Query Service and make the recommended changes. This will ensure that you don’t have any disruption in email filtering over the coming year,...

If you query the legacy DNSBLs via Cloudflare's DNS move to Spamhaus Technology's free Data Query Service

Are you currently using the Spamhaus Project’s DNS Blocklists (DNSBLs) and use Cloudflare’s DNS? If you've answered "yes" to both of these questions, you need to make some changes to your email infrastructure.

Sakuraをご利用中のお客様、Spamhausのブロックリスト設定を変更してください。

Sakuraのお客様のなかで、Public Mirrorsを通してSpamhaus.orgの無料のブロックリストをご利用中の方々に、2021年11月30日火曜日以降はこのサービスが利用できなくなることをお知らせします。

"The day I blocked a nation from sending email..." and its unlikely aftermath

In celebration of the first-ever networked email being sent 50 years ago today (!), one Spamhaus Project researcher recounts when they blocked the whole of Italy from sending email, and nobody wanted to do anything to fix it!

Spammer Abuse of Free Google Services

Over the past year, Spamhaus has noticed a surge in spam that abuses free resources belonging to Google. This is becoming a serious concern, because a significant and growing amount of that spam is avoiding use of IP addresses and domains belonging to spammers....