Answer:
1) Inside
Step-by-step explanation:
When a mail is being sent the salutation used is dependent on if the recipient is internal or external.
A more casual salutation is used for internal recipients like colleagues or team mates, with the first name of the person stated then comma.
For example Hi John,
For external recipients it is more formal. It can be in the format Dear (Title) (Name) and then comma.
For example Dear Mr. Samuel,