/usr/lib/sasl2 failed to open directory

10 msg	My Virtual users can't send messages to their o...
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/usr/lib/sasl2 failed to open directory
\ Mark Edwards (27 May 2007)
. \ Victor Duchovni (27 May 2007)
. . \ Mark Edwards (27 May 2007)
. . . \ (Wietse Venema) (27 May 2007)
. \ Andreas Winkelmann (27 May 2007)
. . \ Victor Duchovni (27 May 2007)
. . . \ Andreas Winkelmann (9 Jun 2007)
. \ Mark Edwards (27 May 2007)
. . \ (Wietse Venema) (27 May 2007)
. . . \ Mark Edwards (27 May 2007)
. . . . \ (Wietse Venema) (27 May 2007)
. . . . . \ Mark Edwards (27 May 2007)
. . . . . . \ Mark Edwards (27 May 2007)
. . . . . . . \ (Wietse Venema) (27 May 2007)
. . . . . . . . \ Mark Edwards (27 May 2007)
. . . . . . . . . \ (Wietse Venema) (28 May 2007)
. . . . . . . . . . \ Mark Edwards (28 May 2007)
. . . . . . . . . . . \ (Wietse Venema) (28 May 2007)
. . . . . . . . . . . . \ Mark Edwards (28 May 2007)
. . . . . . . . . . . \ Scott Kitterman (28 May 2007)
. \ (Wietse Venema) (27 May 2007)

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Subject:	/usr/lib/sasl2 failed to open directory
Group:	Postfix-users
From:	Mark Edwards
Date:	27 May 2007

Updating from postfix 2.3.3 to postfix 2.3.8 on Ubuntu (that's the
Edgy to Feisty update) I suddenly started getting warnings in the logs:

May 25 15:37:41 mini postfix/smtpd[4735]: looking for plugins in '/
usr/lib/sasl2', failed to open directory, error: No such file or
directory

Its clear that this is because certain processes are chrooted and
the /var/spool/postfix directory doesn't contain any link to /usr/lib/
sasl2. If I remove the chroots from master.cf the problem goes away,
however I don't particularly like that solution. If I `ln -s /usr/
lib/sasl2 /var/spool/postfix/usr/lib/` I get an error about too many
levels of symbolic links.

Is this a mis-configuration on the part of Ubuntu/Debian? Should /
usr/lib/sasl2 be included in /var/spool/postfix?

Moreover, why these errors all of a sudden? Nothing changed in my
configuration except updating to postfix 2.3.8. Did 2.3.8 decide to
start warning about something that was there all along.

FWIW, I use Dovecot sasl authentication, so I don't think this is a
serious issue for me (right?), I just want to get rid of these warnings.

Thanks!

--
Mark Edwards