Keep being asked for password: Mail Help unhelpful

Question

Last week I had to trash my keychains/passwords on the recommendation of Skype help. It solved my immediate problem but now I get asked for a password every time I launch Mail.
I've tried Mail help and got the following advice:
"To change the keychain lock settings:
Open Keychain Access, located in Applications/Utilities (or click the link provided on this page).
Select your login keychain, choose Edit > "Change Settings for Keychain 'login'."
To reduce the number of requests for your keychain password, deselect the option for the number of minutes of inactivity before the keychain is locked, or increase the number of minutes. You can also deselect "Lock when sleeping" option."
Trouble is, I see nothing that resembles a "login keychain".
Is the above the advice I need. If yes, what/where is my login keychain; if no, what now?

Answer 1

Thanks for the feedback. This means the login keychain itself was "there", just inaccessible for some reason. The actual keychains are stored in one of the following locations, depending on their applicability:
/System/Library/Keychains/
/Library/Keychains/
~/Library/Keychains/
login, in particular, being different for each user, is stored in ~/Library/Keychains/.
On my system, the System keychain is stored in /Library/Keychains/. Do you see a System keychain in more than one of the aforementioned locations? Maybe that's the reason you see more than one instance of it in Keychain Access.
I'm wondering now if the problem was just that there was something wrong with the ~/Library/Preferences/com.apple.keychainaccess.plist preferences file. Guess we'll never know what happened here.
Note: For those not familiarized with the ~/ notation, it refers to the user's home folder. You can easily locate any of the folders referred to in this post by copying the file path here, doing Go > Go to Folder in the Finder, and pasting the file path there.