Top Deliverability’s Blog
Spam Resource: Spamhaus suffered outage; is back now
- February 17, 2023
- Posted by: Top Deliverability
- Category: Industry News Spam Resource
Al Iverson just shared a new brilliant article on Spam Resource:
From 17:00 GMT on Feb 16th through 09:50 GMT on February 17th, spam filterer/security service Spamhaus suffered an outage that meant that “data included in the Data Query Service, Rsync, Spamhaus Intelligence API, and Border Gateway Protocol Firewall was not refreshed between these times.”The way most Spamhaus data is shared with the world allows for quite a bit of redundancy and resilience against downtime, in that DNS queries can be cached, DNS zones are handed out to and stored by different remote DNS servers. Meaning that while some of Spamhaus core systems may have been offline during this time, spam filtering continued unabated. They’re saying that their ability to make any updates (additions or removals) was effectively blocked during the downtime, meaning anybody waiting for removal from a Spamhaus list probably had to wait a bit longer for a response than usual. And also, perhaps spam filtering effectiveness was down
Read more here: Spamhaus suffered outage; is back now
Email Service Providers Handbook
The most comprehensive “Handbook of Email Service Providers“!
All SpamAssassin rules in one place, EXPLAINED!
& REPLY CODES
All SMTP/ESMTP commands and reply codes in one place, EXPLAINED!
Free DNS Tool
Check the DNS records of your domain with our free DNS tool.
The most comprehensive Email Deliverability and Marketing Glossary!
- Term: Border Gateway Protocol (BGP)
- Term: Spam Placement
- Term: Spamhaus
- Term: Firewall
- Term: Spam
- Term: Domain Name System (DNS)
- Term: Application Programming Interface (API)
- Term: Email Service Provider (ESP)
- Term: Deliverability
- Term: SpamAssassin
- Term: Extended Simple Mail Transfer Protocol (ESMTP)
- Term: Simple Mail Transfer Protocol (SMTP)