Wez Furlong
caadc0e7e8
The logic in this part of the ready_queue is to loop while we have messages, and work through the connection plan. There are a few cases in the lower level smtp_dispatcher that don't directly manipulate the disposition of a message if something goes wrong. The logic at that layer will bubble up an error with the expectation that the ready_queue looping logic will try again on another connection. What actually happened was that the error propagated up and the message would get "silently" re-queued (with the recent Delay logging, we'd get a DispatcherDrop record for the context). This isn't desirable because the visibility into what happened is low, and also because the action being taken isn't necessarily in alignment with what smtp_dispatcher thinks is happening. What this commit does is to catch the error case (instead of letting it propagate) and log a transient failure. This handles the visibility side of this issue. We'll tackle the mismatched expectations in a follow-on commit.
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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