Wez Furlong
d5decd1361
While doing a torture test with a very large combination of the number of domains, campaigns and tenants (effectively unbounded in any meaningful time period), using the smart sink to generate bounces and suspensions, I found that the overhead of tracking the set of bounces and suspensions by scheduled queue was too high: each bounce lookup was O(number-of-bounces), and when you can have 100k admin bounces configured, that is not good for the miss case, which, despite the volume of admin bounce records, is still the dominant case. This commit introduces a helper map/multi-index type that maintains indices for the common tuples: * (domain, campaign, tenant), * (domain, tenant) * (domain) * other then uses an appropriate index based on the current context. That reduces the the lookup cost to effectively constant time (3 x O(1) lookups), unless there are admin bounces registered in the "other" bucket, in which case there is an additional O(number-of-other) lookups.
KumoMTA
KumoMTA is an open-source Message Transfer Agent (MTA) designed for high-performance outbound email functionality, similar to commercial enterprise MTAs such as Momentum, PowerMTA, and Halon.
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