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AOL Accidentally Rejects Millions Of Messages

AOL began rejecting connections instead of temp-failing them under certain conditions. This resulted in a major increase in non-delivery receipts worldwide.

How Web Hosting Providers Can Battle Fraudulent Sign-ups

Fraudulent sign-ups are a major problem for web hosting providers - particularly for providers offering VPS's and other flexible hosting options.

How Botnets Send Spam (In Layman's Terms)

A guest blogger describes how and why spammers use bot nets to send spam.

What is fakemx.net and why are they temp failing me?

In this post, we discuss what fakemx.net is, and why it's generating temporary delivery failure notices in your mail server logs.

Why Is Yahoo! Temp Failing My Mail?

We explain why Yahoo! fails connections to its mail servers with error: 421 4.7.0 [TS01] Messages from 1.2.3.4 temporarily deferred due to user complaints.

Most popular SMTP responses - updated for August 2012

A summary of the top-50 most popular SMTP error responses, as collected at a major web hosting provider.

How did I get 412,139 spam messages in my Gmail spam box?

How did I get 412,139 spam messages in my Gmail spam box?

The leap second that killed the Internet (well, parts of it)

A bug in various software components caused a severe global outage of various services including the popular social news site Reddit.

LinkedIn Password Leak: Probably Not Brute Forced

Someone recently stole 6.5 million passwords from LinkedIn, publishing a list of SHA1 password hashes. We explain why we think these weren't brute forced.

Spamhaus blocks the Direct Marketing Association

Spamhaus blacklists the Direct Marketing Association (DMA)

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