[Dovecot] Mail delivery to subfolders via address extension, and prefered lda method

Hi,

I want to deliver mails directly to subfolders, based on address extensions.

Example:

Emails sent to: micha+test@example.com

Should be stored into user micha, folder INBOX.test

I was able to reproduce this with exim and dovecot-lda:

command = /usr/lib/dovecot/dovecot-lda -e -m "INBOX.${substr_1:$local_part_suffix}"

But I was wondering if I could do this within dovecot, which would enable me to use LMTP instead of dovecot-lda.

Which brings me to my second question:

Which method is "better" for dovecot, lda or LMTP?

Micha Krause