[AuckLUG] Sendmail configuration

[Mark Foster]

> You can also try relay mail out via your ISPÿÿs SMTP server. If you are
> using something like DSL you will need to do it this way.

Should assert here that if your internet connection is anything short of 
an Ethernet, Frame Relay or DDS Service, this is almost certainly a 
necessity.  Mail seen to be received via SMTP from 'customer' IP address 
ranges are invariably either identified as SPAM or at least, 'up-scored' 
to make your spam rating higher.

I would tentatively consider Fixed-IP DSL/Cable services as 'OK' for 
direct SMTP but you need to keep an eye on things. Some RBL type services 
(SORBS comes to mind) are overly zealous at identifying customer IP ranges 
and offering them as 'high spam probability sources'.

By using your ISP's SMTP you keep your nose keen, as ISPs are not usually 
guilty of relaying UCE to anyone on purpose (and where spam is relayed 
this way, there's usually a clearly documented way of getting hold of the 
ISP to have the offender tracked down.)

In short, if you're on Dynamic IP DSL/Cable/Wireless/Dialup you should 
most certainly be using your ISPs SMTP server as a 'smarthost'.


Mark.