F-SECURE INTERNET GATEKEEPER WINDOWS 2000-2003 SERVER 6.61 Administrator's Manual page 353

Environment:
F-Secure Anti-Virus for Internet Mail is installed on a host named
smtp.my.intranet.
The original Mail Transfer Agent remains on the original
computer, but the host name is changed to something else, for
example mx.my.intranet.
The configuration of the original Mail Transfer Agent is changed
so that all inbound e-mail is routed to F-Secure Anti-Virus for
Internet Mail at the smtp.my.intranet host.
The DNS MX records are changed to point my.sub1.domain and
my.sub2.domain to the smtp.my.intranet host. All inbound mails
come to the Mail Transfer Agent running on the mx.my.intranet
host.
Firewall rules are changed to enable incoming and outgoing
SMTP connections to/from mx.my.intranet host only.
No changes in sub-domain networks.
F-Secure Anti-Virus for Internet Mail configuration:
F-Secure Anti-Virus for Internet Mail is configured to accept
incoming connections on port 25.
F-Secure Anti-Virus for Internet Mail is configured to accept mail
from mx.my.intranet, smtp.my.sub1.intranet and
smtp.my.sub2.intranet hosts only.
The smtp.my.sub1.intranet and smtp.my.sub2.intranet hosts are
specified in the Intranet Hosts table. All e-mail coming from these
hosts will be treated as outbound.
APPENDIX F
Advanced Deployment Options
353