Frequently Used Terms for Email Marketing

The following table contains abbreviations and terms frequently used in Email Marketing.

Term	Definition
BHD	Bounce Handler Daemon. Processes asynchronous bounced email (bounces that do not occur in the SMTP communications between the Email Sending Daemon and the Mail Transfer Agent).
Bounce	An email that is returned due to a temporary or permanent error condition. There are hard bounces and soft bounces as described in the following list: Hard bounce. The email was not delivered and can never be delivered. For example, if the email address is invalid. Soft bounce. The email cannot be delivered because of a temporary problem such as a full mailbox and can be delivered when the problem no longer exists.
CTD	Click Through Daemon. Handles the following customer actions: Unsubscribe and Subscribe so contacts can opt in or opt out of email lists. Forward to a Friend provides method for capturing new email addresses. Trackable URLs track customer clicks on an embedded link in an email. Read Receipts logs message opens.
Daemon	A program that is not invoked explicitly, but is dormant waiting for an action or event to activate it.
DNS	Domain Name System. Created to provide a way to translate domain names to their corresponding IP addresses. The DNS server maintains a list of domain names and IP addresses and each request is pointed to the correct corresponding IP address.
DMZ	Demilitarized Zone. A section of your corporate network that acts like a neutral zone or buffer between your internal network and the Internet. It is created by placing one firewall between the outside (internet) and Web servers, and a second firewall between the Web servers and your internal network. External users can access servers in the neutral zone, but not servers on the internal network. The servers in the DMZ handle incoming and outgoing traffic.
DNS groups	DNS domain names are categorized into groups called a record and each record is given a special name such as MX or A. MX (type of record). Specifies a domain name which can receive and possibly relay emails. This domain probably contains a server hosting an MTA. A (type of record). Maps a domain name to an IP address.
ESD	Email Sending Daemon. Manages the following tasks: Email Construction and Personalization. Delivery of outbound email to Mail Transfer Agents. Synchronous bounced email. Bounces that occur in the SMTP conversation between the Email Sending Daemon and the MTA.
MTA	Mail Transfer Agent. A program responsible for receiving, routing, and delivering email messages. MTAs receive email messages and recipient addresses from local users and remote hosts, perform alias creation and forwarding functions, and deliver the messages to their destinations. An MTA is sometimes called a Mail Transport Agent, a mail router, an Internet mailer, or a mail server program. Commonly used MTAs include sendmail, qmail, and Exim.
SMTP	Simple Mail Transport Protocol. Used to move each email over the Internet.
SOAP	Simple Object Access Protocol. The use of XML and HTTP to access services, objects, and servers in a platform-independent manner. For more information about SOAP, see Oracle Business Intelligence Web Services Guide.
WSD	Web Survey Daemon. Resides in the DMZ and supports Web landing sites and surveys without the need for SmartScript.