Ho fatto le varie installazione seguendo, oltre al tuo suggerimento la guida del sitohttp://www.shupp.org/toaster/#qmail
Ma ho i soliti problemi con qmail:
digitando "qmailctl stat"

ricevo il seguente messaggio:

/service/qmail-send: unable to open supervise/ok: file does not exist
/service/qmail-send/log: unable to open supervise/ok: file does not exist
/service/qmail-smtpd: unable to open supervise/ok: file does not exist
/service/qmail-smtpd/log: unable to open supervise/ok: file does not exist
messages in queue: 0
messages in queue but not yet preprocessed: 0

E se provo ad avviare manualmente qmail ottengo:

Starting qmail
qmail-send service not running
qmail-smtpd service not running