Final answer:
The use of greetings like 'Good morning' in an email depends on the context; however, basic email etiquette recommends beginning with a polite salutation and ending with a courteous closing. A proper email should use standard spelling, punctuation, and capitalization, and clearly state the email's purpose.
Step-by-step explanation:
Whether it is rude to not say Good morning, Good afternoon, or Good evening when writing an email depends on the context (option b). However, as part of basic email etiquette, it is generally recommended to begin with a polite salutation, especially if you want to make a good impression. Your email address and subject line are your first opportunity to greet the recipient and set the tone for the message. A proper salutation is akin to saying hello on a phone call; it acknowledges the recipient and shows respect for their time.
Using a salutation such as "Dear [Title] [Last Name]" is a friendly and courteous way to start an email. End your email with an appropriate closing, like "Thanks" or "Regards," along with your name to maintain professionalism. The content of your email should follow standard rules of spelling, punctuation, and capitalization to indicate that you respect your reader. Furthermore, clearly stating the purpose of your email in the first couple of sentences helps your reader understand the email's intent.
Remember, the tone of your email should be polite and courteous, avoiding overly casual language, jokes, or sarcasm. Proper email etiquette involves making a positive first impression with your reader, and adhering to these guidelines is an essential aspect of professional communication.