From: Victor Duchovni (Victor.DuchovniMorganStanley.com)
Date: Fri Sep 02 2005 - 22:04:53 CDT

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On Sat, Sep 03, 2005 at 01:29:29AM +0200, Tony Earnshaw wrote:

> Nonetheless, Red Hat's updates are nihil from version to RH version;
> only does so-called bug fixes), and updating using source code (with or
> without RPMs) can break more recent systems - which I've experienced.
>
> So what does all this do to help OP?
>

Use of nss_ldap, nss_nis, ... on mail servers performing local(8)
delivery is inadvisable, avoid at all costs (dump the user list) to
/etc/passwd or "db" periodically, ... If nss_ldap, ... must be used,
provide enough replica servers and sufficiently robust networking to
make lookup failure extremely improbable. Consider "-o soft_bounce=yes"
in the local delivery agent if other failures can be reasonably
ruled out, and monitoring is added to move messages that repeatedly
into the incoming queue of a second instance without soft_bounce...
or other gross hacks...

--
        Viktor.

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