Etiquette is a tool where we have to treat people with respect and kindness to make them feel comfortable. It opens up an effective form of communication with like-minded people and helps to create positive relationships in personal or professional business. It shows that we have consideration for other people. Showing good manners is a way of being courteous in a personal or professional way. Etiquette can be used in several ways such as composing business correspondence and there are certain dos and don'ts that have to be followed.
Do's and don'ts are necessary in writing an email or even a letter. The etiquette still has to be polite and generous. They are an important characteristic in email etiquette. Whenever writing an email the dos and don'ts are followed or otherwise the business correspondence is inappropriate
Etiquette is important in business correspondence when writing an email to your colleagues. We should be able to interact respectfully and politely with our colleagues when corresponding through an email. The writing on the computer through an email should show we have an understanding of etiquette writing before actually starting it.
It should convey a courteous and friendly tone regardless of what the email is about. We should avoid any grammar and spelling mistakes. In addition, a professional business correspondence should be polite and concise. It should give a clear message to the reader. Etiquette is important to have if we want to keep good relations with the receiver of the email.
We need to follow the certain dos when corresponding with other businesses or with our colleagues. They are followed to keep a friendly environment. Email is an effective form of communication and we should have the proper etiquette when interacting through an email. 'By requiring employees to use appropriate, businesslike language in all electronic communications, employers can limit their liability risks and improve the overall effectiveness of the organization's e-mail and Internet copy in the process'  . This quote explains that employees should use appropriate language when communicating through an email because it improves the overall effectiveness.
Do's email etiquette
Use an introductory statement of who you are, if you are sending someone an email for the first time.
We should use an introductory statement, so we can tell the receiver of who we are.
Do respond to email in a timely manner.
We should not take a long time of about two to three weeks to reply to the sender. It does not show respect. Even if we acknowledge that we have received the email would be nice.
Be sure to type with proper capitalization and grammar.
We can be mistaken for a spammer if we use wrong grammar.
Do use the "CC" courtesy copy option sparingly.
Make sure, only the people that care about the message contents or attachments have to review the email.
Do make you subject line meaningful but short. 
The subject line often lets the viewer know if the email needs attention now or can wait until later
There are certain don'ts that have to be looked at and given consideration when sending an email to somebody in a business. Email etiquette is changing, and it is vital to know the rules. Email is a powerful tool that liberates communication. Writing action-oriented email is a critical skill that will help you get results quickly in the short term. It is important for us to know the don'ts for email etiquettes.
Don'ts Email Etiquette
Do not write in CAPITALS.
Writing in all capitals can convey that you are shouting in your message, and nobody likes to be yelled at. Consider other ways to get your message across. Using all capitals can be annoying.
Do not use e-mail to discuss confidential information.
E-mail messages are easy to copy, print and forward. If you don't want anything getting out, don't e-mail it.
Don'tÂ sendÂ irrelevantÂ messages,Â especiallyÂ to mailing lists or newsgroups.
Messages that are not necessary should not be sent because they're not needed.
Don't send chain letters and "make money messages."
Always check before sending because these messages can contain viruses.
Don't reply to email messages when angry. 
You may write things that are inappropriate and may regret later on.
We should all use the appropriate etiquette at the right time. It shows that we have respect for others. The appropriate do's and don'ts are just a way to actually tell you what you should do. It is actually up to you to take action and have the right behaviour even when you're communicating through a email. Also, if you're in a business where you have to communicate a lot, having the right etiquette is best thing you can ever have. It shows that you're a respected human. By following these do's and don'ts we can have a better environment to work in. Email etiquette is something that is sensitive and we should always have a positive attitude when writing an email for your colleagues or in general. Having a positive attitude will give you the right etiquettes.
Flynn, Nancy. Email Etiquette. N.d. October 10, 2010. <www.emailreplies.com>.
Lee, Sherly. Email Etiquette. N.d. October 12, 2010. <http://www.smallbusinessdelivered.com/encouraging-email-etiquette-rules-dos-and-donts.html >.
Email Etiquette. N.d. October 13, 2010. <http://www.dynamoo.com/technical/etiquette.htm>.