UPDATED: 1/8/2011
This article describes free usage limits of network test providers used by Spamassassin, along with recommendations if they are worthwhile to pay for service for sites large enough where a data feed is necessary. Recommendations are based upon statistical data in Spamassassin's weekly masscheck as collected at RuleQA.
It is important for Spamassassin sysadmins to know the limits and usage restrictions of the various network test providers. If those providers deem that you are abusing their service they might choose to silently block your IP address. This can cause significant problems like mail delivery slowdown as Spamassassin waits until DNS timeout during each mail scan, along with test failure which can cripple your spam filter.
Subscribe for announce-only newsletters targeted at Spamassassin Sysadmins. These newsletters are roughly twice a month.
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This article describes free usage limits of network test providers used by Spamassassin, along with recommendations if they are worthwhile to pay for service for sites large enough where a data feed is necessary. Recommendations are based upon statistical data in Spamassassin's weekly masscheck as collected at RuleQA.
It is important for Spamassassin sysadmins to know the limits and usage restrictions of the various network test providers. If those providers deem that you are abusing their service they might choose to silently block your IP address. This can cause significant problems like mail delivery slowdown as Spamassassin waits until DNS timeout during each mail scan, along with test failure which can cripple your spam filter.
Subscribe for announce-only newsletters targeted at Spamassassin Sysadmins. These newsletters are roughly twice a month.
Read more »
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