On 07/04/2020 21:33, Andrew C Aitchison via Exim-users wrote: >> Getting that knowlege depends on your existing setup. >> Possibly it's a case of pointing Exim at your AD server, >> and hoping it really does talk LDAP sanely. > > Exim does recipient callouts and cutthrough delivery. > Are either of these useful for an MX backup ?
Yes, but limited in that they can only discover the (non)existence of accounts when the primary is up. You'd have to decide on policy and implementation for when it isn't - eg. a getting-stale (but local) user database. Refusing connections wholesale would defeat the object of having the secondary. Using them does have the advantage that per-user filtering (including, for cutthrough, body-scanning) is localised in one place. Of course, requiring that your ldap server(s) stay up is an issue in itself. -- Cheers, Jeremy -- ## List details at https://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
