[Mailman-Developers] before next release: disable backscatter indefault installation
iane at sussex.ac.uk
Tue Mar 11 11:34:57 CET 2008
--On 10 March 2008 10:46:39 -0700 Kenneth Porter <shiva at sewingwitch.com>
> --On Monday, March 10, 2008 10:19 AM +0000 Ian Eiloart
> <iane at sussex.ac.uk> wrote:
>> Yep, it would be the easiest way to integrate acceptance testing with
>> Exim. It's common for sites to put Exim installations in front of
>> Exchange servers (for security reasons), and do SMTP call forwards to
>> test deliverability.
> Another approach is to dump the valid users list periodically using a
> Windows-based LDAP app and then copy that to the OSS front end MTA for
> validation. Check the MIMEDefang list archives for howto.
That's pointless with Exim. Exim's capable of querying the LDAP server
directly to check the existence of a user - so people can use their
accounts as soon as they're created. The advantage of a call forward is
that it allows for other factors that might determine deliverability, such
as quota problems, personal filters or whatever other features the backend
might support. Call forwards are definitive, and don't require knowledge of
the nature of the backend.
IT Services, University of Sussex
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