[Dovecot] default_mail_env %d var problem

[pythonic]

> > Now if I try to connect imap I get foll. error.
> > --
> > imap(jane): May 19 01:58:08 Error:
> > mkdir_parents(/home/vhosts///home/jane//.imap/INBOX) failed:
> > Permission denied
> > --
> >
> > So %h and %u looks working but not %d :(.
> 
> What userdb are you using? If you really are logging in as
I am using pam
> "jane at domain" and not as just "jane", the userdb is removing the
> @domain part. Otherwise the error message would begin
> imap(jane at domain).
> 
May be you are right but uw-imap works with that same pam module. 
Does pam has any role to play in dovecot's %d macro expansion?
I wish this to work then I could deploy dovecot on all my mail servers.
Thanks.