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102
U n i t 7
EMAILS AND MEMOS
7.1. WHAT IS EMAIL?
In its simplest form, email is an electronic message sent from one
device to another. With email, you can send or receive personal and
business-related messages with attachments, such as photos or formatted
documents. You can also send music, video clips and software programmes
(Figure 7.1). Internet email addresses typically have two main parts:
student@university.com.
First there is the user name (student) that refers to the recipient's
mailbox. Then there's an at sign (@). Next comes the host name
(university), also called the domain name. This refers to the mail server, the
computer where the recipient has an electronic mailbox. It's usually the
name of a company or organisation.
The end of the domain name consists of a dot (".") followed by three
or more letters (such as .com and .gov) that indicate the top-level domain
(TLD). This part of the domain name indicates the type of organisation or
the country where the host server is located.
These top-level domains are currently in use:
.aero – for the air-transport industry;
.com – for businesses, commercial enterprises, or online services like
America Online. Most companies use this extension;
.edu – for educational institutions and universities;
.info – for all uses;
.org – for non-commercial organizations;
.pro – for use by professionals, such as attorneys and physicians.
For e-mail addresses outside of the United States, there is often a two
letter country code. For instance, .ca indicates Canada, .uk indicates the
United Kingdom and .mx indicates Mexico.
Account names can use letters and numbers, such as "student2007,"
can't contain any spaces, and are limited in length, depending on the service.
Internet e-mail messages consist of two major sections:
• header – structured into fields such as summary, sender, receiver,
and other information about the e-mail;
• body – the message itself as unstructured text; sometimes
containing a signature block at the end.
The header is separated from the body by a blank line. Messages
usually have at least four fields in the header:
1. From: The e-mail address, and optionally name, of the sender of
the message.
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