[exim] hide ehlo string

Hi,

my MUA uses the local IP address of my PC when sending mail. This looks
not very nice and, worse, some spam filters add a score for such things,
which I want to prevent. So I want Exim to just leave the helo=[...]
out. In Exim3, I did this by changing received_header, but with Exim4 it
is not that easy, because of $sender_rcvhost.

So, I think I have two options:
- rebuild sender_rcvhost with string expansions expressions. If anybody
already did this, I would be glad to get it.
- change sender_helo_name, e.g. in an ACL. Is this possibly?

Thanks for any help.


Regards,
Jakob