today it seems like the RBL Pattern is broken, some E-Mails are getting blocked who are not on the Blacklist.
We are seeing the same thing with multiple customers.
The log says that IPs are blocked due to an RBL entry with cbl.abuseat.org or sbl-xbl.spamhaus.org and rejects the mail. But when you check with the…
The team is working on a permanent fix for v9.7MR9, likely to be released towards the end of the year.
There are a number of ways to avoid the issue in the meantime:
- switching to a different DNS provider. We have mainly seen this with customers using Quad9.
- alternatively, you can set a DNS forwarding rule that would pass DNS requests for cbl.abuseat.org to a different DNS resolver
- Disabling recommended RBL checks will guarantee mail doesn't get unnecessarily rejected but may allow more spam through
So is this fixed in 9.709-3?
It works :)
by default we have quad9 dns