You need to ensure that email messages from Server1 are forwarded to users

You have two servers that run Windows Server 2008 named Server1 and Server2. You install
Windows SharePoint Services (WSS) 3.0 on Server1. You install the SMTP feature on Server2. You
configure the outgoing email settings on Server1 to use the SMTP service on Server2. You need to
ensure that email messages from Server1 are forwarded to users. What should you do?

A.
On Server2, create a new application pool, and then associate the application pool with a new
Web site.

B.
On Server2, configure the SMTP service to accept anonymous connections and to relay email
messages.

C.
On Server1, create a new application pool. On an internal DNS server, create a new MX record for
Server1.

D.
On Server1, create a new application pool. On an internal DNS server, create a new MX record for
Server2.

Explanation:
You can configure the SMTP service to accept relayed email from servers in your farm. You can
decide to accept relayed email from all servers except those you specifically exclude. Alternatively,
you can block email from all servers except those you specifically include. You can include servers
individually, or in groups by subnet or domain. You can enable both anonymous access and email
relaying but by doing this, you increase the possibility that the SMTP server will be used to relay
unsolicited commercial email (spam).
Reference: Configure outgoing email settings (Windows SharePoint Services)
http://technet.microsoft.com/en-us/library/cc288949(TechNet.10).aspx