> We use exim all the way to local delivery. And it handles Maildir++ > quotas just fine.
Ah, right. I was misremembering. It's the DB-stored quotas in dovecot that I was thinking of using some time back. Sorry for my misstatement. > of indexing during delivery are negligible for us in general and > potentially negative in some scenarios (mass mail to many/all users). Is this negative hypothetical or have you actually seen load spikes in situations like this? > I don't think there are many situations where a MTA can do better > than a LDA when it comes to rejections during SMTP time. Since at I agree. The opportunities are more theoretical than practical. If you include processing user .forward files as part of the exim recipient verification or if you include a quota check after SMTP DATA ....