[Kolab-devel] Some postfix suggestion on Kolab (antispam, security, performance)

[Fabio Pietrosanti]

Gelpi Andrea wrote:
> Fabio Pietrosanti ha scritto:
>   
>> Gelpi Andrea wrote:
>>     
>>> Be careful using zen.spamhaus.org, it is not free for commercial use.
>>> If you write something put a note on it.
>>>   
>>>       
>> It simply depend on the amount of query you do each day, not on the usage.
>>
>>     
>
> NO.
>
>  From http://www.spamhaus.org/organization/dnsblusage.html
>
> Use of the Spamhaus DNSBLs via DNS queries to our public DNSBL servers 
> is free of charge if you meet all three of the following criteria:
>
>     1. Your use of the Spamhaus DNSBLs is non-commercial*, and
>     2. Your email traffic is less than 80,000 SMTP connections per day, and
>     3. Your DNSBL query volume is less than 320,000 queries per day.
>
> The 3 condition are in and not in or ... and
>
>   *Definition: "non-commercial use" is use for any purpose other than as 
> part or all of a product or service that is resold, or for use of which 
> a fee is charged. For example, using our DNSBLs in a commercial spam 
> filtering appliance that is then sold to others requires a data feed, 
> regardless of use volume. The same is true of commercial spam filtering 
> software and commercial spam filtering services.
>   

>From the description provided the "non commercial" mean if you use
spamhaus to reseller an antispam or other internet based email services.

But Kolab is a groupware system mainly used by companies for their own use.

This mean that the concept of "non commercial" use of Spamhaus is equal
of "for commercial use" of Kolab.

I mean, all companies use it for *commercial use* in the sense that they
do business and they require to use their own email server for
exchanging email with their customers (for commercial use).

They are not reselling an email service, but they are using spamhaus for
commercial use (but not in the sense that spamhaus define commercial use).

So imho spamhaus could be used without any issue in the Kolab
environment that is a good platform for everything but not for an
internet service provider.

Fabio
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