There are a few different ways to begin a mail in English depending on the context and formality of the message. Here are a few common options:

Formal:

  1. If you are writing a formal email, it is best to use a professional and polite tone. Begin your email with a formal greeting, such as "Dear [Name]," followed by a colon. For example, "Dear Ms. Johnson," or "Dear Professor Smith,".

Semi-formal:

  1. If you are writing to someone you have a professional relationship with, but are not as familiar with, you can use a semi-formal greeting such as "Hello [Name]," or "Hi [Name],". These greetings are appropriate for colleagues, clients, or business partners.

Informal:

  1. If you are writing to someone you have a close relationship with, such as a friend or family member, you can use a more casual greeting such as "Hi [Name],".

It's important to remember to use appropriate language and tone throughout the rest of your email, based on the level of formality you established in your opening.