problem with exim4, cyrus21 and db4, help wanted..

[Lars Schimmer]

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Hi!

I just setup a exim4 mailserver with cyrus21 und a db4 database. No
mailuser is a local user on the system.
Now I want to check with a exim4-router, if the user has a valid
mailbox. On the net I found:
# look in the Cyrus IMAPD mailboxes.db file for local_domains local
# parts to be verified
local_user_verify:
~   driver = accept
~   domains = +local_domains
~   local_part_suffix = +*
~   local_part_suffix_optional
~   condition = ${lookup{user.${local_part}} dbmnz
{/var/lib/cyrus/mailboxes.db} {yes}{no}}
~   verify_only
But that one gives only the error hit:

2004-02-24 16:23:14 Berkeley DB error: /var/lib/cyrus/mailboxes.db:
unexpected file type or format
2004-02-24 16:23:14 failed to expand condition
"${lookup{user.${local_part}} dbmnz {/var/lib/cyrus/mailboxes.db}
{yes}{no}}" f
or local_user_verify router: failed to open /var/lib/cyrus/mailboxes.db
as a db (v3/4) file: Bad file descriptor
I use:
exim4:
~  Installed: 4.30-5
cyrus21-imapd:
~  Installed: 2.1.16-4
libdb4.2:
~  Installed: 4.2.52-10
db4.2-util:
~  Installed: 4.2.52-10
Has anyone a real solve for this problem?
I really want to check for a valid mailbox in the database without
having all the users local on the machine.
Thx in advance.

Cya
Lars
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