AOL began rejecting connections instead of temp-failing them under certain conditions. This resulted in a major increase in non-delivery receipts worldwide.
Fraudulent sign-ups are a major problem for web hosting providers - particularly for providers offering VPS's and other flexible hosting options.
A guest blogger describes how and why spammers use bot nets to send spam.
In this post, we discuss what fakemx.net is, and why it's generating temporary delivery failure notices in your mail server logs.
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.
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?
A bug in various software components caused a severe global outage of various services including the popular social news site Reddit.
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 blacklists the Direct Marketing Association (DMA)
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