[KLUG Members] Sendmail Question

[Adam Williams]

> > What are the differences between LOCAL_RELAY and SMART_HOST?
> LOCAL_RELAY is for email addresses without an "@" (send to "fred").
> SMART_HOST is for everything else (send to "fred@domain").
> If you absolutely everything to forward through your ISP's server,
> I'd set them both.

If you want to provide local mail to accounts on your box don't set
LOCAL_RELAY.  Otherwise set both.

> Threading is calculated on mail headers not normally displayed, 
> it has nothing to do with the subject line.

If you grouse around in the headers (I assume GW lets you see the
message source), you'll see things like -

In-Reply-To:  <20031020T144520Z_F15F00180000@elite4god.com>

and 

Message-Id:  <1066677022.30856.16.camel@lx1>

- I believe that threading is based upon a hashing of these values.