Hi Timo and List, The Dovecot 2.0.10 changelog includes:
* LMTP: For user+detail@domain deliveries, the +detail is again written to Delivered-To: header. I have recipient_delimiter = + set, lmtp_save_to_detail_mailbox=yes is working, however Dovecot 2.0.12 LMTP processes are not adding these headers to messages on delivery. Are there other settings that may potentially conflict with this feature?