
For example a sender creates a message using an email client, a SMTP server determines the best route to the message's destination (including contacting the DNS name server to resolve the host domain name), the message is then routed through multiple Internet routers, the mail server receives the message (usually an ISP incoming mail server mailbox), then the recipient receives the message using an email client. Whats really impressive is that all this take place in nano second or seconds. It's almost instant.
The composition of an email has several components. There's a "to:" line, which is the recipient's email address; "Cc:" line which is a carbon copy or courtesy copy of the composed email. This can be sent to any email address. The "Bcc:" line ticks me off sometimes! It stands for blind courtesy copy which does not allow the original receiver of the email message to view what email address is within this line. The "Subject:" line states the purpose, description or title of the email. The "attach:" line can be used to add files to the email such as photos, videos, documents, most types of digital media. The "message body:" is where you type your message. It's the text of the email. Some people use an email signature as their closing to the message body, much like a signature on a paper letter. Except, here a digital representation would be used, either typed text or an uploaded signature file.
Here's a shot of my Yahoo! mail composer.
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