On Tue, 7 Apr 2020, Jeremy Harris via Exim-users wrote:
On 07/04/2020 19:43, Linda Pagillo via Exim-users wrote:
set up Exim as a backup MX server for the
Windows servers.
Preferably you need to have the backup know what the legitimate
email accounts are - both local-part and domain - so that it
can reject bad ones at SMTP time. Otherwise it becomes a source
of backscatter (and, while I think of it, please do ensure that
your primary does the same. It's not the default Exchange
configuration; they do accept-then bounce as standard).
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 ?
I have to admit most of the people I know have an exim server in front of
their exchange system rather than as an MX backup.
--
Andrew C. Aitchison Kendal, UK
[email protected]
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