As reported on the mailop mailing list on Friday May 25, 2018, the blocking list at dnsbl.cyberlogic.net now contains a "wildcard" DNS entry, effectively listing the entire internet. If you use this DNSBL in your mail server configuration, you should remove it immediately, as it will impede your ability to receive legitimate mail.
All about DNSBLs, aka blocklists/blacklists // Since 2001 // Published by Al Iverson
| Thanks for visiting! Remember that nowadays, (most) blocklists don't usually govern deliverability and inbox placement on their own. Want to learn more about email marketing best practices, email technology, and deliverability troubleshooting? Then you'll want to check out my other site, Spam Resource. |
New blocklist: SPFBL
Leonardo from SPFBL shared the following information with me and I thought it would be useful to share it here with folks.
Status of bad.psky.me: QUESTIONABLE
Noted and respected spam filterer Spamhaus is indicating that they believe the the Protected Sky (bad.psky.me) blocklist is "fraudulent." They report that Protected Sky is "an anonymously-run DNSBL service which was pirating [Spamhaus] data and republishing it as its own work." Spamhaus further indicates that Protected Sky doesn't follow DNSBL best practices as indicated in RFC6471.
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