What style should I use in e-mail salutations to superiors, colleagues, or juniors? [duplicate]

Solution 1:

I personally do a greeting (Good morning/afternoon) versus dear or hi, and feel this is more appropiate than dear or hi. Normally all my emails start as follows:

Good morning/afternoon [First Name or Mr/Ms Last Name],
Hope all is well. [Start email]

I feel this is friendly and respectful to the recipient, and you would choose which titles to use depending on the relationship.