| Spamhaus may block legitimate email if you use that blocklist! [message #151451] |
Fri, 15 April 2022 00:33  |
DataSmith
Messages: 8
Registered: March 2013
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Spamhaus, which is one of the blocklists built into Kerio Connect has a new policy that might affect your mail server - and block legitimate email - since Kerio may interpret the new response as a spam code.
Specifically "Spamhaus has introduced the following error codes; 127.255.255.254, and 127.255.255.255" and I believe Kerio connect sees this as spam
The problem happens if your mail server makes an "excessive number of queries" of their blocklist, or your mail server uses a public DNS server (e.g. Open DNS or Cloudflare, or google) and....
Spamhaus says"
"We are no longer allowing queries via open resolvers due to massive abuse of our systems, and while it has worked that way for years, it does not any more. "
To use Spamhaus they say there are 2 solutions
1) Sign up to use their free Data Query Service. I did that and have not managed to get it to block spam tests.
2) "your queries must come from a dedicated IP with attributable reverse and forward DNS" My mail servers all meet all of that yet it still the built in Spamhaus block list says that legit emails are spam.
Read more about it here
https://www.spamhaus.com/product/help-for-spamhaus-public-mi rror-users/
Sign up here
https://www.spamhaus.com/free-trial/sign-up-for-a-free-data- query-service-account/
Does anyone have a solution to use the new system at Spamhaus or have success with the built in Spamhaus blocklist recently?
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