What are the required password characteristics for the email program you use?

How many authentication factors does the email program you use require?
What are the required password characteristics for the email program you use? Include length, complexity, expiration, and banned words or phrases.
In your opinion, are the requirements adequate? Managing User Accounts and Passwords (Chapter 9)
How many authentication factors does the email program you use require?
What are the required password characteristics for the email program you use? Include length, complexity, expiration, and banned words or phrases.
In your opinion, are the requirements adequate?