Product manual

GFI MailEssentials 15 Appendix 2 - Lotus Domino | 270
Screenshot 151: Active Directory selection
15.2.2 Set up DNS/Router Firewall
Configure the machine where GFI MailEssentials is installed to act as a gateway (also known as "Smart
host" or "Mail relay" server) for all email. Effectively, all inbound email must pass through this
machine before relayed to the mail server for distribution (it is the first to receive all emails destined
for your mail server).
The same applies for outbound emails; mail server must relay all outgoing emails to the gateway
machine for scanning before these are sent to external recipients via Internet (it must be the last
'stop' for emails destined for the Internet). In this way, GFI MailEssentials checks all inbound and
outbound mail it is delivered to the recipients.
The MX record of your domain must point to the mail relay server
NOTE
If your ISP manages the DNS server, ask this provider to update it for you.
Since the new mail relay server must first receive all inbound email, update the MX record of your
domain to point to the IP of the new mail relay/Gateway server.
Verify the MX record of your DNS server as follows:
1. From command prompt, type nslookup and press Enter.
2. Type set type=mx and press Enter.
3. Type your mail domain and press Enter.
The MX record should return a single IP that corresponds to the IP address of the machine running GFI
MailEssentials.