The world's largest spam sources revealed to be hosting companies
MailChannels has released its version 2.5 email filtering platform. This blog post describes what's new in 2.5.
AOL began rejecting connections instead of temp-failing them under certain conditions. This resulted in a major increase in non-delivery receipts worldwide.
We demystify the 571 error code sometimes returned by Verizon's mail servers.
Fraudulent sign-ups are a major problem for web hosting providers - particularly for providers offering VPS's and other flexible hosting options.
We discuss why AOL's mail servers sometimes respond with the error message "554 (RTR:BL)" and what you can do to get email flowing to AOL users.
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.
MailChannels announces Policy Scripting, a new feature to improve IP blocklist avoidance. Introducing highly flexible user behaviour monitoring & enforcement.
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