[Exim] Quick question

Hi,

Can someone tell me if the output format of "exim -bpu" differs between
exim3 and exim4?

I've written a quick 'n' easy perl script for parsing the output of this
command for searching on different fields with different output formats.

I'm was going to offer it as contrib, but I don't know if it would work on
exim4.

Cheers,
Matt.