If you own multiple Business Email accounts — each associated with a different domain and Yahoo! ID — you can switch mailboxes by signing out of the first account, then signing in again with your other Yahoo! ID. To sign out and sign in again:

1. Locate the welcome message in the upper-right corner of the screen, e.g. "Hi, Mary", and click the name or the image beside the welcome message.

   
   Business Email Welcome Message.

2. Click the "Sign Out" link in the pull-down menu.

   
   Welcome Menu: Sign Out

3. Click the "Sign In", or "Mail", or "Sign in as a different user" link.

   
   Yahoo! Home Page Sign In Links

4. Enter the Yahoo! ID and password for the email account you wish to access, then click Sign In.

   
   Sign in to Yahoo!

You can avoid this sign-out/sign-in process by accessing your accounts in different browsers; for example, use Firefox for one account, Internet Explorer for another.

If you have different domains associated with the same Yahoo! ID, you can switch accounts from the welcome message in the upper-left corner of the Business Email screen.

1. Click the welcome message (e.g. "Hi, Mary").

   
   Business Email Welcome Message.

2. Select an email address from the list of available addresses.

   
   Welcome Menu: Address List

   If you're using the original version of Business Email, Classic interface, your available email accounts are listed on the left side of the screen. Select your Business Email account from this list.

Note: You cannot access someone else's Business Mail mailbox unless you have that user's Yahoo! ID and password.