DNSBL
A misuse of Spamhaus blocklists: PART 2 – How to limit outbound spam
If you’ve skipped the first part of this series, we strongly recommend you go and read this blog first to understand the misuse of Spamhaus blocklists to block outbound mail. However, if ...
A misuse of Spamhaus blocklists: PART 1 – blocking outbound email
One issue our folks handling tickets submitted by blocked users experience are messages like: Help! My IP is listed by Spamhaus and now I can’t send emails! My provider is rejecting all ...
If you query the legacy DNSBLs via GoDaddy move to Spamhaus Technology’s free Data Query Service
Currently accessing the free legacy DNS Blocklists (DNSBLs) via the Public Mirrors, and using GoDaddy's network? You'll need to make some minor changes to your email infrastructure. The changes are simple to ...
The Policy Blocklist: what is it, and why should you be on it?
It’s not always "bad" to be listed on one of Spamhaus' DNS Blocklists. Despite what you may think, there is one list you may want to be on: the Policy Blocklist (PBL) ...
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 ...
A website to effect change
We're thrilled to share our brand-new Spamhaus Project website with you! It was high time for an overhaul, but now we have a website that reflects who and what Spamhaus is today ...
Spamhaus Blocklist (SBL) listings are moving
Any abuse desk worker or Trust and Safety team member who has received a Spamhaus Blocklist (SBL) email notification, can view the full details of the listing on www.spamhaus.org. However, change is ...
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 ...
The conundrum that is the modern use of NAT at a carrier grade level
Modern NAT, including Carrier Grade NAT (CGNAT), complicates tracking by hiding multiple devices behind one IP, akin to a circus full of clowns. This anonymity facilitates spamming and malware distribution. ISPs can ...
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 ...
