Yesterday, when signing into my MSN account using one of my four usernames, I was required to verify the account and get a security code via email. Why did this check occur? Is it a timing issue where every so often this verification will be required? Is it due to not signing in using this username for a certain period of time?
I have had to get a security code via email when changing passwords or traveling and signing in from a different location. But, neither of these situations occurred this time with this username.
Also, should I save this code? The next time a security code is requested, can I enter this same code or is a new code generated with each request?