Industry
The World’s Top Spam Sources
3 min read
The CBL tracks botnet infections by analyzing spam traffic aimed at its extensive honeypot network, and then lists the IP addresses from which this spam…
Read post: The World’s Top Spam SourcesPosts
Industry
Spam Volume Drops Over The Holidays, And Then Restarts
1 min read
Global spam volumes have suddenly resurged in a major way.
Read post: Spam Volume Drops Over The Holidays, And Then Restarts
Industry
Getting Onto a Blocklist Without Sending Any Spam
2 min read
Getting Onto a Blacklist Without Sending Any Spam
Read post: Getting Onto a Blocklist Without Sending Any Spam
Industry
Groupon Phishing Scam To Get Your Email Address
2 min read
Groupon Phishing Scam
Read post: Groupon Phishing Scam To Get Your Email Address
Industry
Comparing Spamhaus with Proactive Connection Throttling
3 min read
We investigated the spam reduction efficacy of proactive throttling (aka traffic shaping) versus connection blocking using a reputable blacklist.
Read post: Comparing Spamhaus with Proactive Connection ThrottlingIndustry
Amazon users blocked by the SORBS blocklist
2 min read
SORBS is listing Amazon EC2’s entire IP address space, causing major deliverability problems for Amazon EC2 customers.
Read post: Amazon users blocked by the SORBS blocklist
Industry
The World’s Most Popular SMTP Error Responses
3 min read
We took a look at 9 million delivery attempts through one of our spam filters and compiled a list of the most common spam connection rejection messages.
Read post: The World’s Most Popular SMTP Error Responses
Industry
Spam bot behavior suddenly changes
1 min read
Spammers appear to have changed their software so that it less often sends the QUIT command, as required by the RFC.
Read post: Spam bot behavior suddenly changes
Industry
All about TLS-encrypted spam: Part III
3 min read
Techniques for solving the CPU load issues caused by encrypted spam are discussed.
Read post: All about TLS-encrypted spam: Part III
Industry
Spammers on Amazon EC2 starting to hammer Asterisk (VoIP) servers
1 min read
There have been reports from the Asterisk open-source PBX community that spammers are attempting to gain access to Asterisk PBX through brute-force attacks.
Read post: Spammers on Amazon EC2 starting to hammer Asterisk (VoIP) serversStay updated with MailChannels
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