The business letter closing shows your relationship to the reader and tells them the correspondence is finished. Business letter closings are the same, whether you write a standard letter or an email.

In the process of closing my law practice ... I have always found it fascinating the way folks close an email or letter. I use "Sincerely" in a business letter and "Take care" in an email.

Often, it’s enough to signal the closing of the reading ... reading benefits from a greeting at the top and a salutation of some sort at the end, so do our own letters. You probably use ...

Each of his 13 letters mentions grace in both the opening and closing greetings—and this in a world where introductions and conclusions were far more standardized than they are today.