Re: [exim] Aliases in LDAP - good idea?

On 06/05/2020 21:50, Rigu Cucu via Exim-users wrote:
> When a lookup cannot be completed in a router or transport, delivery of the message (to the relevant address) is deferred, as for any other temporary error. In other circumstances Exim may assume the lookup has failed, or may give up altogether."

If the routing is being done for local delivery then you will have
already accepted and spooled the message.

> So, lacking any long-term, multi-hours at least caching mechanism,

The spool counts as multi-hour, unless you configure retry rules
excessively tightly.

Your only issue will be if you want your recipient-verification
to do these ldap lookups.
--
Cheers,
Jeremy