[Dovecot] lmtp error at domains containing "-" sign

[ckubu]

hallo,

I have running dovecot 2.0.9.

I want to deliver mail with rcipient prameter "-", we spoked about that at 
thread "LMTP with address extension" and after your patch and version 2.0.8 
that works. 

But now, there's an another much greater problem. No mails to adresses, which 
domain-part contains an "-" sign wil be delivered (i.e. 
test at aku-punkt-berlin.de). lmtp is looking about the user "test at aku" instead 
of "test at aku-punkt-berlin.de" and the following logentries appears:

Feb  3 10:46:36 vserver08 dovecot: auth: Debug: sql(test at aku): 
SELECT '/var/vmail/' || maildir as home, '5000' AS uid, '5000' AS 
gid, '*:bytes=' || quota  as quota_rule FROM mailbox WHERE username 
= 'test at aku' and active = true

Feb  3 10:46:36 vserver08 dovecot: auth: sql(test at aku): Unknown user

Greatings
Christoph