What is Email?
Email is abbreviated as electronic mail. Email is used to exchange (i.e., send & receive) mails across internet.
From year 2000 onwards, electronic mail was a preferred medium over postal mail.
Advantage of Email
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1) Productivity tools: Email is usually packaged with a calendar, address book, IM (instant messaging) and more for convenience and productivity. A valid Email is required to Access to web services from shopping sites like Amazon, Flipkart. Email is also required for social networking sites like Facebook.
2) Easy mail management: Email service providers have tools that allow you to file, label, prioritize, find, group, and filter your emails for easy management. You can even easily control spam, or junk email.
3) Privacy: Your email is delivered to your own personal and private account with a password required to access and view emails.
4) Accessible anywhere at any time: You don’t have to be at home to get your mail. You can access it from any internet enabled computer or mobile.
5) Availability: Emails can be sent 24 hours a day, 365 days a year.
6) Email: is paperless, and therefore, beneficial for the planet. Not only can you reduce the costs of paper, but you are also actually reducing the damage paper usage does to the environment.
Component in Email Service
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1) Email Server: Public (Google, Yahoo) or Private (Managed by administrator of corporate or private sector)
2) Protocols: Outgoing (SMTP)/Incoming (POP3, IMAP4)
3) Access Email Messages: Webmail, Email Client (Windows, Linux, MAC based)
Email Server
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1) Architecture Types: Public or Private/Corporate.
2) Operating System: Windows or Linux/Unix
Example: Microsoft Exchange or Qmail/PostFix
Email Protocol
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1) Sending Emails: SMTP (Simple Mail Transfer Protocol)
2) Receiving Emails: POP3 & IMAP4
Default Port | Used For |
80 | HTTP (Exchange Web Services, contacts and Events) |
443 | SSL (HTTPS) |
3268/3269 | LDAP global catalog searches / LDAP global Catalog searches using SSL |
143/993 | IMAP/IMAP (SSL) |
110/995 | POP/POP (SSL) |
25/465 | SMTP (non-SSL)/SMTP (SSL/TLS) |
POP3 | IMAP4 |
Post Office Protocol Version 3 | Internet Mail Access Protocol Version 4 |
There is a one-way incoming mail protocol that downloads the copy of the message from the Email Server to the local machine. Once the post office protocol completes the process, it removes the original data from the server's inbox and the data are saved to the local machine. | There is a two-way incoming mail protocol that downloads only email headers instead of its entire content. Using IMAP Protocol, email resides on both the users' local computers and servers, allowing the user to access them from other platforms as well. This protocol updates whatever changes the user makes on his email client. "IMAP allows you to access email from different devices."
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Port 110 – non-encrypted port | Port 143 – non-encrypted port |
Port 995 – SSL/TLS port | Port 993 – SSL/TLS port |
Method to access Email Messages
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1) Webmail: Gmail, Yahoo Mail, AOL (America Online)
2) Email Client: Microsoft Outlook, Mozilla Thunderbird & MAC based Airmail
Webmail Providers(Example) | Webmail Client(Example) |
AOL Mail, Gmail, Outlook.com, Yahoo Mail | Roundcube, SquirreMail, Zimbra, Horde |
Hardware Requirements | Software Requirements |
1 GHZ or higher CPU | Any O/S based on Windows, Linux or MAC |
RAM>= 512 MB with Internet connection. | Cookies must be enabled on web browser. |
Microsoft Outlook 2016
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Hardware Requirement | Software Requirement |
CPU with at least 1GHZ speed | Windows 7 SP1 or above Operating System |
RAM>=2GB | .NET4 or .NET4.5 Framework installed |
Minimum 3GB of HDD free space | Microsoft Account Login |
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