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Getting Started Guide Installation for Microsoft Exchange 2007 & 2010  47
<..\Program Files\Exchsrvr\Mailroot> If installed on the same machine as
Microsoft Exchange 2007/2010.
4.3.2 Firewall port settings
Configure your firewall to allow the following port connections. These
ports are used by GFI MailEssentials to connect to GFI servers:
 DNS (Port 53) - Used by anti spam filters (IP DNS Blocklist,
Sender Policy Framework, Header Checking).
 FTP (Ports 20 and 21) - Used by GFI MailEssentials to connect to
'ftp.gfisoftware.com' and retrieve latest product version
information.
 HTTP (Port 80) - Used by GFI MailEssentials to download product
patch and anti spam filter updates (i.e. SpamRazer, Anti-Phishing,
and Bayesian anti spam filters) from the following locations:
o 'http://update.gfi.com'
o 'http://update.gfisoftware.com'
o 'http://support.gfi.com
o 'http://db11.spamcatcher.net' (GFI MailEssentials 14 or
earlier)
o 'http://sn92.mailshell.net' (GFI MailEssentials 14 SR1 or later)
 Remoting (Ports 8021) - Used in the latest builds of GFI
MailEssentials for inter-process communication. No firewall
configuration is required to allow connections to or from the
remoting ports since all the GFI MailEssentials processes run on
the same server.
NOTE: Ensure that no other applications (except GFI
MailEssentials) are listening on port 8021.
 (OPTIONAL) LDAP (Port 389) - Used by GFI MailEssentials to
get email addresses from SMTP server. ONLY required if the
server running GFI MailEssentials does not have access/cannot
get list of users from Active Directory e.g. in a DMZ environment or
other environment which does not use Active Directory.
4.4 Installing on Microsoft Exchange or SBS server
4.4.1 Upgrade from earlier version
If you are currently using a previous version of GFI MailEssentials
(version 12 or 14), you can upgrade your current installation while at
the same time retain all your existing configuration settings.
Important notes
 Upgrades cannot be undone i.e. you cannot downgrade to an
earlier version once you have installed the latest version.
 On upgrading an existing installation, licensing reverts to trial
version and a new fully purchased license key for the GFI
MailEssentials 2010 is required. For more information on new
license keys, refer to: http://customers.gfi.com