Re: [cobalt-users] SMTP hole maybe - any ideas

[Larry Smith <lesmith@xxxxxxxxx>]

On Wednesday 04 June 2003 06:30, Ian wrote:
> The relaying of this email to 50 others on the same server is not
> prevented, even though POP b4 SMTP is enabled. Admittedly it will not allow
> the relaying to domains that are not on the server, but will happily send
> on this email to the 50 or so domains on the same server.

You are missing the _main_ point here - THIS IS NOT RELAY
(sorry for shouting).

Local delivery is _NOT_ relay.  It is delivery plain and simple.  Relay is I 
send a message to your RAQ that IT sends to another box/system/server, etc.

Local delivery is local delivery (is local delivery) not relay.  Anyone - 
meaning it does not matter one bean what the sender address is - can send TO 
an address on your RAQ (barring other blocks against their domain/ip).

The mail system does not "relay" between domains on a single box - it simply 
reads the alias, access, etc tables and "delivers" to the local address.

If you do not want this "behavior" then either run a totally separate instance 
of sendmail for each domain (on a separate port of course) or put each domain 
on a totally separate box.

-- 
Larry Smith
SysAd ECSIS.NET
sysad@xxxxxxxxx(Office)