Product manual

GFI MailEssentials 17 Glossary | 281
D
Decompression engine
A scanning module that decompresses and analyzes archives (for example, .zip and .rar files)
attached to an email.
Demilitarized Zone
An internet-facing section of a network that is not part of the internal network. Its purpose
typically is to act as a gateway between internal networks and the internet.
Directory harvesting
Email attacks where known email addresses are used as a template to create other email
addresses.
Disclaimer
A statement intended to identify or limit the range of rights and obligations for email
recipients
DMZ
See Demilitarized Zone
DNS
See Domain Name System
DNS MX
See Mail Exchange
Domain Name System
A database used by TCP/IP networks that enables the translation of hostnames to IP
addresses and provides other domain related information.
E
Email headers
Information that precedes the email text (body) within an email message. This includes the
sender, recipient, subject, sending and receiving time stamps, etc.
Email monitoring rules
Rules which enable the replication of emails between email addresses.
Exploit
An attack method that uses known vulnerabilities in applications or operating systems to
compromise the security of a system.
F
False negatives
Spam emails that are not detected as spam.