Email!

What Is an E-mail?

E-mail basically means Electronic Mail.

To be able to receive and send E-mails you need to have an e-mail address. When you create an account using a Internet Service Provider you are usually given your own personal e-mail address (it’s usually something like yournamenumber@internetserviceprovider.com).

For example  johnsmith12@yahoo.co.uk.

Why do you need an E-mail address?

For example if you’re applying for a job, most companies will ask you for an e-mail address simply because its easier for them to contact you back by an e-mail rather than send you a letter or ring you.

If you want to set up a Facebook or Twitter account(or any other online account) they usually ask you for your email address.

How E-mail Works?

It appears that if a sender writes an E-mail and sends it to the Recipient the message automatically shows up in their Inbox.

However the whole process is more complicated then it might look.

For example:

• The original sender creates an e-mail in their Mail User Agent (MUA) and then sends it. The MUA is an application that allows the sender to create an e-mail message, receive and read e-mail. E.g. – Outlook or Gmail.
• Senders chosen MUA then transfers the message to a Mail Delivery Agent (MDA)/ Mail Transfer Agent (MTA) which then forwards the message.
• The email is now at the Company Network Cloud.
• From the Company Network Cloud it gets put into Sender’s Mail Server where its Placed into an E-mail queue where all the other undelivered e-mails are.
• The message then goes through different routers; this is usually where the hackers try to change the path of an e-mail to deliberately change the origin of the message.
• After that the e-mail goes through a series of Virus and Spam Blockers were any possible viruses or unwanted pictures etc. get blocked and only your message goes through.
• Now your email is ready to be delivered and it goes to Recipients Mail Server, then into Company Network Cloud and through their MDA/MTA and into their MUA (Inbox).