Capitalizing the first letter of each word in letter greeting [closed]

I have searched for an answer on the site, but all the questions I have found (e.g. this one) seem to be less general.

Assuming that I'm writing a cover letter to join a team working on a project called, say, 'Purple Frog', I'm not sure whether I should write

Dear Purple Frog Project Team,
...

or

Dear Purple Frog project team,
...

What are the rules that I should follow here?

Solution 1:

There is nothing special about the greeting of a letter with regard to capitalization. You should capitalize words where they are part of a proper noun, just like everywhere else in the letter.

If the team's name is "Purple Frog Project Team" then that is the capitalization you should use. If it is a team that just happens to work on a project called "Purple Frog" then you should write "Purple Frog project team".