Throughput from qmail

[Vaz, Len]

I know this is an open ended question with a lot of variables involved, but
is there a place or does anyone know what the throughput might be for mail
being sent out via qmail. How many emails/sec has qmail been known to send
to the outside world with optimal configurations assumed? Please do not
blast this email, like I said I know there are a lot of factors involved,
from the OS you are running it on to the network you are on. Appreciate any
help.

Len