On 26/06/2023 10:25, Ray O'Donnell via Exim-users wrote:
> This raises a related question - how often will this query get executed? Is it once when the server is restarted, or each time a new client connection begins, or something else altogether?
Exim does run a cache for lookups, but it also re-execs at certain points in processing
(to regain privs, needed eg. for delivery to file) and that loses the cache.
So it's complicated. In general you can't rely on a given lookup being
done only once, or on being done every time.
In practice: within ACL processing, only the first one. Routers and transports,
probably separate.
https://exim.org/exim-html-current/doc/html/spec_html/ch-file_and_database_lookups.html#SECID64
--
Cheers,
Jeremy
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