[gentoo-user] Help with local mail, please

[Peter Humphrey <peter@prh.myzen.co.uk>]

Hello list,

For years, I've been using postfix to accept mail from LAN hosts, and from the 
Internet via my ISP. This has never worked as I want it - it's just so complex 
to set up and understand. Well, it is for a bear of little brain like me.

Can someone tell me how to make postfix accept all mail addressed to any host 
or user on the LAN - and not forward any mail to anywhere at all? It's running 
on a single-homed host on the LAN, and all other hosts are also single homed. 
Any of four hosts can originate mail, and I have fetchmail running on the same 
host to collect POP3 mail from my ISP. Dovecot serves IMAP4 to KMail clients 
on the LAN.

At present, postfix is insisting on forwarding mail addressed to root on a LAN 
machine, but it's supposed to be acting on behalf of that machine. Two other 
hosts' mails never show up anywhere.

Or perhaps there's a more suitable MTA out there?

-- 
Regards,
Peter.