ZhangHuangbin wrote:zen.spamhaus.org free tire has 3 limits:
1) Your use of the Spamhaus DNSBLs is non-commercial*,
and
2) Your email traffic is less than 100,000 SMTP connections
per day, and
3) Your DNSBL query volume is less than 300,000 queries
per day.
https://www.spamhaus.org/organization/dnsblusage/
This is true however since my email server is at a datacenter and their dns servers are limited, there is no isp dns servers so I use Google's DNS servers. When Spamhaus is queried this way, I could easily be the millionth person that day that tried querying spamhaus via google's dns. It is also well known that many isp's dns servers are in the same situation on a possibly smaller scale so Spamhaus recommends using your own dns server as I did with bind.
I'm just mentioning this because many iRedmail users are likely not getting the benefits of zen.spamhaus.org which is the best I have used for my needs. I was able to delete my entire blacklist and I get at best a few spam's a day. Looking at the mail logs, the majority of the traffic is attempted spam that spamhaus catches and to a good extent, barracuda as well. To reiterate, Spamhaus is very touchy about which dns you use on your server to query them since you aren't the only one who queries them with well used dns servers.
Is installing bind by default something you would consider or would it benefit few people?