[Exim] Rewriting sender address to null sender

Hi,

I want to use a rewrite rule like

postmaster@???        <>        F

i.e. mail sent with a postmaster@??? address should be regarded as
a bounce message with null sender, subject to ignore_bounce_errors_after,
for example.

However, if I do this, then exim dies (core dump) after the To: address
in the SMTP conversation.

If I use the S flag, as such:

^<postmaster\@my\.domain>     <>      FS

and I try:

sendmail -brw \<postmaster@???\> then I get

2003-10-17 12:53:04 Rewrite of <postmaster@???> yielded unparseable address:
missing or malformed local part in address <>

This issue was raised in 2000 on the exim-users list, but I'm not sure if there was
a solution:

http://www.exim.org/pipermail/exim-users/Week-of-Mon-20000515/018190.html

In any event, exim surely shouldn't die with the first rewrite rule above.

Cheers
Stephen
---
Stephen Marquard
ICT Consultant
scm@???
Cell: +27-83-500-5290