[Exim] (no subject)

I love this tool - CYGWIN is new to me but using exim looks like a REAL
winner here.
I want to be able to use the -f command line option.
I keep trying to use "untrusted_set_sender" in configure
but it just gives me an errior ....

LOG: PANIC DIE
Exim configuration error in line 526:
auth name missing

I put the line at bottom of configure file.

Can you help me?

Thanks

Will Renkel