[Dovecot] LDAP usernames with spaces

[Tim Schafer]

I'm trying to setup dovecot to work with an existing virtual user 
database in LDAP in order to replace courier-imap.

I have users in LDAP with dn of the following form
cn=Firstname Lastname,ou=company,dc=domain,dc=com

and the uid attribute containes a userid of the form
flastname

The on disk format for an account is:
/home/exim/<uid>/.maildir


My first problem is that I cannot get dovecot to authenticate the 
existing DNs
It complains:
dovecot: auth(default): plain(?,ipaddress): Username contains disallowed 
characters

I'm assuming it doesn't like the spaces.
Any way around this?

Also, I don't see any way to support the seperate username and userid
where the username is for authentication
and the userid is used for on disk pathname.
Anyway to support this?

Thanks in advance.

-- 


Regards,
Tim Schafer