Is it appropriate to use the sentence- " Greetings of the Day" in a formal email instead of Good morning?

If I receive an e-mail that begins with "Greetings of the day", I will assume that it is spam and automatically reach for the delete button. If I am e-mailing someone that I know (or have e-mailed before), I usually begin with "Hi, Fred" (you can more or less say whatever you like in e-mails - there are no rules). If I am e-mailing someone that I don't know, then I might treat it like writing a letter and begin with "Dear Mr. Jones".

If you want me to read your e-mails, always address me by name. However, if you are sending me spam, please do begin with "Greetings of the day" and I'll know not to read any further and press the delete button.

Having said all that, I do receive perfectly good e-mails (from British companies) that begin with "Good morning". There's nothing wrong with it. "Greetings of the day", however, sounds like Babu English and is probably best avoided.

I'm not sure there's such a thing as a "formal" email. Email is informal, and generally doesn't follow the rules of formal correspondence.

If you're referring to an email message conveying information of a "serious" or formal nature (e.g., business correspondence rather than casual conversation), it is probably better to keep it concise and just get to the point, leaving out fluff like "Good morning" (which has no relevance, anyway, since you don't know when the message will be read).

But if you do put in some form of such opening text, "Greetings of the day" is such generic blather that people will associate it with spam, as Mick suggests.

It definitely sounds like it is from someone from India to me. I got one today and they signed their name with a very Italian-sounding name, but they were not fooling me. I live in Italy and I know what a person who normally speaks Italian, trying to write in English sounds like, and even Google Translate would not say "Greetings of the Day!" No thanks, "Alvaro."

There is no earthly reason to wish someone good day etc. in an email, formal, or informal, just as it has never been the practice (at least in the twentieth century) to do so in a written letter, at least in my experience in Britain.

An informal communication cuts out the superfluous politenesses, which in English are really only:

1. The address (Dear Sir, Your Lordship, etc.)
2. The parting phrase (Yours sincerely etc.)

For a formal email (e.g. to a business or someone you don’t know) I would retain them. For an informal email I would start “John” and sign off with “David”. If you are a young person “Hi John” might be more usual.

If I wrote “Hoping this finds you as it leaves me” I would be trying to be humorous.

But the French do it differently. It takes years of study to learn how to sign off a letter in French.