mail forwarding problem

[Anne Wilson]

On Friday 25 May 2007, zephod at cfl.rr.com wrote:
>
> So do I need to look at configuring sendmail? From what I've read on
> this list, that's not the easiest thing to do.
>
Postfix.sendmail is easier to configure, though I've never done it for use 
with a company network.  Of course that means installing and configuring 
postfix, but the config files are helpfully commented.

Basically you have to write a transport map file that tells it what to do with 
local traffic and what to do with external messages.  On a home LAN it would 
look something like

lydgate.net	smtp:[borg.lydgate.lan]
.lydgate.net	smtp:[borg.lydgate.lan]
*	smtp:[smtp.mailbox.co.uk]

That is, send local mail to the smtp server on the server box.  Send 
everything else to my ISP's smtp server.

When you've discovered the names you need to put in there, you run 'postmap 
transport', and you're away.

Finally you have to tell the system to use postfix.sendmail instead of 
sendmail.  There's a small utility that helps here.  I can't remember 
exactly, but it's something like mail-agent-switcher.  I'm sure someone will 
give you the correct name.

Anne


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