[Dovecot] no sieve with lmtp_save_to_detail_mailbox=yes

[Dennis Kuhn]

i have a problem with sieve and lmtp_save_to_detail_mailbox = yes. If
the mailbox "detail" exists everything works fine, but if the mailbox
detail does not exist then sieve does not work. The .dovecot.sieve.log
file says

sieve: info: started log at Mar 06 14:28:47.
error: msgid=<531877EE.7070806 at heinlein-support.de>: failed to store
into mailbox 'test2': Mailbox doesn't exist: test2.

I think this is the reason why no sieve script is executed, but why is
sieve here involved?
Is there any relation between lmtp_save_to_detail_mailbox=yes and sieve
or is this a bug?

The same sieve file works with the same mailaddress without
mailextension, so the sieve script is not the reason for the failure.

I am using dovecot version 2.2.12

Dennis Kuhn

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