Manage groups with ldap und ptloader

Igor Brezac igor at
Tue May 25 10:04:27 EDT 2004

On Tue, 25 May 2004, Sven Schiwek wrote:

> Hi,
> I installed cyrus-imapd 2.2.3 and imported my old mails. The Shared-
> folder have group ACLs like group:sysop. I changed my authentification
> from PAM to SASL with saslauthd.
> The system is working fine, but if I want to change a group ACL cyradm
> says:
> ----8<----
>  > dam admins group:sysop
> deleteaclmailbox: group:sysop: Invalid identifier
> ---->8----
> In the logfile ptloader wrote this informations:
> ----8<----
> hermes imap[1508]: ptload(): pinging ptloader
> hermes ptloader[1747]: accepted connection
> hermes ptloader[1747]: doing LDAP lookup of user (null)
> hermes ptloader[1747]: Username not available.
> hermes master[563]: process 1747 exited, signaled to death by 11
> hermes master[563]: service ptloader pid 1747 in READY state: terminated
> abnormally
> hermes imap[1508]: ptload(): empty response from ptloader server
> ---->8----
> I think the search for user '' (null) is the Problem.
> Can I configure the cyrus System that cyradm ignore the ptloader
> response or is there an other way to solve this problem?

I suggest you build cyrus-imapd 2.2.4 because of numerous ptloader ldap
fixes/enhacements.  Read the imapd.conf man page for the ldap related
options.  Your other option is to use a different authentication mechanism
such as unix.  See cyrus-imapd/doc/overview.html for more.  You will need
to recompile cyrus-imapd when you change authentication mechanisms.

If you want more flexibility in choosing pts module and authentication
mechanism at runtime, you can try my patch at

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