If your invitation has two sections (with the headings: "Set Up POP Access" and "Questions?"), your administrator has given you an email address that you'll access exclusively with your own POP mail program (such as Outlook or Thunderbird). Because you won't use Yahoo! to access your mail, you don't need a Yahoo! ID.
To activate your new email address:
If you don't already have it, ask the account administrator for your account password. If you don't know how to contact your administrator, you can find the administrator's email address in your invitation.
Open your desktop email program (such as Outlook or Eudora), and enter your password and the POP settings included in your activation instructions. For specific help configuring your email program, check your program's help files, or see our step-by-step instructions.
After you enter your settings, send a test message to your new account to make sure that your settings are correct.
Using your desktop email program, check to see if you have any new messages. (If you don't know how to do this, your program's help files should have instructions.)
As soon as you successfully receive your test message, the email address will be activated!
Note: If you don't get your test message, first make sure you've configured your settings properly. If they're correct, check with your administrator to make sure the domain is active. If the domain is still pending, you won't be able to send or receive email just yet. Newly registered domains usually become active within 72 hours.