[Exim] too many nonmail commands

Hi,

We recently upgraded to Exim 4-12 and discovered that our bulkmail
application were getting rejections
based on too many nonmail commands. The app doesn't do things strictly to
the book though (single connection
with RSET's to reduce helo's , quit's etc)

I know the option smtp_accept_max_nonmail is available to cater for this,
but would like to know if this
a new restriction (since 4-12 only).

thanks
Danie