Academy3 email
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This document provides an overview of how email works. It explains that email uses a "store and forward" approach where messages are stored on servers until the destination server is available. It describes the basic infrastructure components like domain name servers, mail servers, and internet service providers. It discusses issues like privacy, security, and best practices for using email safely and efficiently. The goal is to help users understand email concepts and why certain behaviors are important for protecting themselves online.
Academy3 email
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- 2. Session 2 eMail Friend or Foe? It Depends on… •Your eMail address •Your password hygiene •Who is your eMail provider and what you use it for! 2
- 3. Introduction tell you “Click X to do Y“ teach you step-by-step how to send an email/Skype your son/etc advise you on the best computer etc… 3 Why Not? Because nobody can remember that stuff It will be different next week Everyone’s needs are different “I can’t be bothered with all this medical stuff, show me how to do brain surgery” These Sessions Will Not:
- 4. Introduction Show you HOW to be comfortable with new technologies Show you WHY the new ways may be advantageous for you Help overcome the fear Accept change By Explaining the jargon Introducing the concepts Getting you to think “Oh, this is like…” Showing you can’t “break” a computer… usually These Sessions Will Try to: 4
- 5. How does “snail mail” work? It’s “Store and Forward” Uppingham Glasgow Oakham Harboro
- 6. Other ISP Their Broadband Modem Your Broadband Modem Their ISP Backbone Network Your ISP How does email work? Domain Name Server Mail Server Relay Server Mail Server Other ISP ISP - Internet Service Provider Your email app It’s “Store and Forward”
- 7. Domain Names International Company for Assignment of Network Names (ICANN) assigns the addresses to Domain Names • e.g. • google.com • gmail.com • bbc.co.uk • facebook.com • Registered with ICANN • ANYONE can have a Domain Name (from £2 - £100000+ a year) • Each Domain can have lots of Servers • Each Server can have several Hosts i.e. Apps that provide a service 8 Main St Wing UK LE15 8SE HQ BBC CO.UK 212.58.246.000 www.bbc.co.uk/iplayer www.bbc.co.uk/sport www.bbc.co.uk/weather www.bbc.co.uk=212.58.246.129 news.bbc.co.uk=212.58.246.81 Snail Internet www.bbc.co.uk/news/england
- 8. The Internet as a House
- 9. Domain Name Server (DNS) I never use the address for anything, I use a name. • Your computer goes to a DNS server • It keeps a list of names and corresponding IP addresses • It tells your computer what IP address to use
- 10. • All devices have a unique address • like a serial number - the Media Access Code (MAC). • Usually found on the bottom or back of the device • Defined by manufacturer • e.g. 7A:79:19:73:D2:05 Media Access Code (MAC)
- 11. The Internet has a special networking language - the Internet Protocol Anyone who wants to use the Internet has to have an address - the Internet Protocol (IP) address • Google is 31.55.163.183 • The BBC is 212.58.246.104 • First part defined by the Internet Corporation for Assigned Names and Numbers (ICANN) e.g. Google 31, BBC 212 ( for big companies). • The rest is defined by the requesting company
- 12. The Internet
- 13. The Internet - a network of computers So to put a server on the Internet you: 1. buy a Domain name from an ISP • wingvillagehall.club 2. ISP sends details to ICANN 3. ICANN assigns an IP address • e.g. wingvillagehall.club has address 65.39.140.84 4. ISP adds name/address pair to its DNS server. 5. DNS entry is propagated around the world to all other DNS servers
- 14. Other ISP Their Broadband Modem Your Broadband Modem Their ISP Backbone Network Your ISP How does email work? Domain Name Server Mail Server Relay Server Mail Server Other ISP ISP - Internet Service Provider Your email app It’s “Store and Forward”
- 15. Other ISP Harry’s Modem Sally’s Modem hisisp.com Backbone Network yourisp.co.uk How does email work? Domain Name Server Mail Server Relay Server Mail Server Other ISP ISP - Internet Service Provider to:harry@hisisp.com It’s “Store and Forward” hisisp.com IP Address 34.73.46.10 from:sally@yourisp.co.u k Sally Harry 34.73.46.10 It’s “Store and Forward” oriented
- 16. email Apps Client Apps • installed on your computer • emails STORED on your computer • lose computer, lose emails - unless good backup Outlook Express Outlook Thunderbird Mail ……. Web Apps • Nothing installed on your computer • emails STORED on the ISP server • lose computer, get another one and carry on Gmail Yahoo Hotmail Many ISP’s own email system …….
- 17. Efficient Use of email • Use folders or labels • Archive emails not delete • Remember • cc: sends an email to a list of people BUT displays the list to everyone • bcc: as cc: but HIDES the list. • You cannot email large files such as HD photos • Use filters to handle repeated emails • Use filters to remove SPAM
- 18. What is “Store and Forward”? Data is passed to a server that then saves it until the next server is online and ready until it reaches its destination “Fire and Forget” e.g. email
- 19. What is “Conversation” mode? All servers in the path must be working for the request to be sent and the response received.
- 20. Is email “safe”? Used properly and with some caution, YES Used without some thought and care, NO
- 21. Rules! 1.Use a reputable email provider They filter out most bad stuff, SPAM, before you see it e.g. xxx@gmail.com yyy@exchange.com zzz@zoho.com 2.Do NOT use a cheap unknown email provider e.g. xxx@cheapemail.ru 3.NEVER open an attachment from someone you don't know 4.NEVER give your password to anyone on line or telephone 5.NEVER give credit card details unless it is httpS://xxxxx in the address bar and then ONLY if you recognize the domain Best option? Buy your own private domain AND use a reputable email provider e.g. john@wingonline.com - my domain but Gmail provider. Why? Because the bad guys will attack well-known domains because more people are using them. They are unlikely to know your private domain.
- 22. More Rules! 1.Always install an anti-virus app Set it up to scan at least once a week AVG Avast 2.Always install an anti-malware app Set it up to scan at least once a week Malwarebytes 3.Open source apps are FREE and safer Open source programs are written by enthusiastic nerds who are volunteers and passionate. There will be hundreds of nerds checking the app for anything evil.
- 23. An naked email file MIME-Version: 1.0 Sender: john@wingonline.com Sent: by 10.96.9.230 with HTTP; Tue, 3 Feb 2015 11:22:54 -0800 (PST) Date: Tue, 3 Feb 2015 19:22:54 +0000 Deliver: oakleyje@gmail.com Subject: Example email From: John Oakley <john@wingonline.com> To: John Oakley <oakleyje@gmail.com> Content-Type: multipart/alternative; boundary=001a11c1338867c548050e33ff82 --001a11c1338867c548050e33ff82 Content-Type: text/plain; charset=UTF-8 Hello --001a11c1338867c548050e33ff82 Content-Type: text/html; charset=UTF-8 Hello<div class="gmail_signature"></div>
- 24. Your Broadband GooglePlex Backbone Network Your ISP How does Google work? Domain Name Server Mail Server Relay Server Search Engines It’s “Conversation” oriented Request Response
- 25. The Internet Part 1 Millions of computers interconnected with a common “language”
- 26. Questions? About today Still unanswered Anything else 20
- 27. Follow the course on the web at wingvillagehall.club 21