Last updated March 2020
async_bounce_rendering — which thread pool to use for bounce rendering
async_bounce_rendering = true
When a message fails to be delivered due to a timeout or a 5XX error from the remote MTA, Momentum generates and injects a bounce message. If
async_bounce_rendering is true, this job is done in the IO thread pool, otherwise it gets done in the scheduler before returning control to the code that noted the bounce, namely the outbound SMTP or the mail queue maintainer.
The default value is
async_bounce_rendering is valid in the global scope.
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