Bug 166447

Summary:	Postfix does not work with nscd
Product:	[Fedora] Fedora	Reporter:	W. Michael Petullo <redhat>
Component:	postfix	Assignee:	Thomas Woerner <twoerner>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	rawhide	CC:	mike
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2007-07-23 12:37:19 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description W. Michael Petullo 2005-08-21 18:25:47 UTC

From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux ppc; en-US; rv:1.7.11) Gecko/20050815 Epiphany/1.7.4

Description of problem:
I have a laptop that connects to a network whose accounts are hosted by an LDAP server. In order to allow disconnected operation, I user nscd to cache network information and pam_ccreds to cache passwords. For example, nscd caches account information so that "ls -l /home/mike" shows that /home/mike is owned by mike even if the LDAP server is not available to resolve 500 -> mike.

I use fetchmail to grab email from my server. Fetchmail and postfix work fine to deliver my mail when I am connected to my network and my LDAP server is available. However, when I am connected to a foreign network where my LDAP server is unavailable, fetchmail and postfix do not deliver my mail properly.

Version-Release number of selected component (if applicable):
postfix-2.2.3-1

How reproducible:
Always

Steps to Reproduce:
1. Connect to a foreign network so that the LDAP server is not available.
2. Verify that nscd is functioning and account information is cached.
3. Execute fetchmail.

Actual Results: 1 message for mike at mail.flyn.org (774 octets).
reading message mike@mail.flyn.org:1 of 1 (774 octets) fetchmail: SMTP error: 550 <mike@localhost>: Recipient address rejected: User unknown in local recipient table
fetchmail: mail from FETCHMAIL-DAEMON.org bounced to mike
fetchmail: can't even send to mike!
flushed

Expected Results: Fetchmail and postfix should identify mike as a local user because nscd is running.

Additional info:

Comment 1 Thomas Woerner 2005-09-30 16:23:44 UTC

How have you configured LDAP support for postfix?

Please provide your postfix configuration.

Comment 2 W. Michael Petullo 2005-11-12 00:53:12 UTC

Postfix is not configured to use LDAP.  I guess I assumed that postfix/fetchmail
should be able to identify mike using NSS.  Because libnss_ldap is used by
glibc, I thought nscd should be able to cache the lookups.  Once nscd has a
cache, postfix/fetchmail should be able resolve names when the LDAP server is
unavailable.

Comment 3 Thomas Woerner 2007-07-23 12:37:19 UTC

I am sorry, but this is not a postfix problem. Closing as NOT A BUG.

Comment 4 W. Michael Petullo 2010-03-23 19:34:25 UTC

This works fine with sssd on Fedora 12.