Guidance on my config - ReadList.com

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Guidance on my config
\ Joseph L. Casale (24 Jan 2008)
. \ Noel Jones (25 Jan 2008)
. . \ Joseph L. Casale (25 Jan 2008)
. . . \ Noel Jones (25 Jan 2008)
. . . . \ Noel Jones (25 Jan 2008)

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1 msg	Solved (was Re: Relay question)

Subject:	Guidance on my config
Group:	Postfix-users
From:	Joseph L. Casale
Date:	24 Jan 2008

Hey Guys,
I am just wondering if someone could give me a small pointer as to the validity of my config here. I am setting up a CentOS 5.1 server to act as a mail relay with ASSP for our company Exchange server. If someone notices anything they don't think is done optimally, I would greatly appreciate a simple nudge and I will gladly research the recommendation. This is my first attempt at a production box.
Thanks!
jlc

myorigin = $mydomain

myhostname = mail.ActualDomain.com

# ASSP runs on this server, and 192.168.0.5 is my Exchange server
mynetworks = 127.0.0.0/8, 192.168.0.5/32

message_size_limit = 20971520

local_transport = error:No local mail delivery

mydestination =

local_recipient_maps =

# Can I leave this unconfigured?
virtual_alias_maps = hash:/etc/postfix/virtual

# I have a postmaped hash of my Exchange recipients here
relay_recipient_maps = hash:/etc/postfix/relay_recipients

# This is a hash of "ActualDomain.com smtp:[192.168.0.5]"
transport_maps = hash:/etc/postfix/transport

relay_domains = ActualDomain.com

proxy_interfaces = xx.xx.xx.xx

inet_interfaces = all