--On 10 March 2008 10:46:39 -0700 Kenneth Porter <shiva@sewingwitch.com> wrote:
--On Monday, March 10, 2008 10:19 AM +0000 Ian Eiloart <iane@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.
-- Ian Eiloart IT Services, University of Sussex x3148