Hi,
I switched a postfix setup from delivery email via dovecot-lda to dovecot LMTP. But now I found an issue, when an email address has a spike of received emails in a short time postfix try to deliver too many messages for this mailbox in parallel, on dovecot side we see deliveries go slow only for this mailbox, all lmtp processes are busy for this mailbox and delivery for others users stay in queue or are very slow. I'm also investigating on dovecot side, but in the meantime I would like to set postfix for delivery a less number of parallel message for the same mailbox. I try to set lmtp_destination_concurrency_limit or lmtp_destination_recipient_limit to a low value (5) than default (20) but probably are the wrong parameters because all messages stay in queue for a long time. Can someone tell me if there is a parameter to set fewer parallel deliveries to the same mailbox via LMTP? Thanks -- Alessio Cecchi Postmaster AT http://www.qboxmail.it http://www.linkedin.com/in/alessice
