Re: PATCH: Re: local_recipient_maps & NIS

On Tue, 10 Feb 2004, Matthias Andree wrote:

> Solution: Configure Postfix to use a nis: map, this will log warnings
> and TEMPORARILY reject mail. Just tested again to be sure, on SuSE Linux
> 8.2.
>

This only works for remote SMTP submission when NIS fails before the
recipient is accepted. For local submission (/usr/lib/sendmail) and NIS
failures after the recipient is queued, but before the message is
delivered, incorrect bounces still occur.

The workaround is better than nothing, but it is not complete. Similar
considerations apply to nss_ldap, ... with similar partial workarounds.

Note that with a correctly working C library, when NIS (or LDAP) is down
eventually all "smtpd" processes hang and Postfix is DoSed. So it a good
idea to use the Postfix dictionary interface (instead of the nss wrapper)
as much as possible when the dictionary type in question supports
timeouts.

--
Viktor.