To sign out at any time, compose an SMS message on your
mobile phone like this:
sender's screen:
out
Send the message to 58243. You'll receive a confirmation
message on SMS that you have signed out.
If you are signed in, but don't use Yahoo! Mail for SMS
for one week, you will automatically be signed out. You
will then have to sign in again the next time you access
Yahoo! Mail for SMS.
