Control of relaying on local domains

[andreas palsson <did@algonet.se>]

Hello.

I'm using Listar as mailinglistsmanager on a Slink system, and I had to
modify 'exim.conf' a little to allow relaying from Listar:

---
#sender_host_reject_relay = *
sender_net_accept_relay = 127.0.0.1/32
---

This works fine now, but I'm little concerned about security.

Have I opened a hole here?
Is it better to use the actual IP of the machine instead of localhost?

Any ideas or comments are much appreciated.
-- 
   == andreas pålsson == did@algonet.se ==