Default Email Address: Your default email address will be used automatically when forwarding or composing new messages. In order to change the default email address used, click on "Mail Accounts" under the Management section of the Options page. Once on this page, just select the address you would like to use as your default mail address and then click on "Make Default."
You should know that your default email address won't be used when replying to an existing message. Instead, the email address that the message was sent to will be selected automatically.
Address Deletion: If you wish to delete an email address, click on "Mail Accounts" in the Management section of the Options page. You'll see a list of all of your email addresses. Just select the address you would like to delete, and then click on "Delete." You'll be taken to a confirmation page where you'll have to confirm your wish to delete this account. Please keep in mind that if you delete one of your email addresses, you won't be able to re-create the email address without the assistance of the web address administrator.
Email Address Preference Management: Every email address can have preferences that are associated with it (i.e., "From" Name, "Reply-to" Address, Email Signature, and Mail Indicator). If you set these up, these preferences will be used when sending and receiving messages from your different email addresses and will allow you to use different preferences for each of your addresses. To access these preferences, click on "Mail Accounts" in the Management section of the Options page. You'll see a list of all of your email addresses. Just select the address you would like to set your preferences, and then click on "Edit." On this page, you'll be able to choose:
If you choose not to set separate preferences for your separate addresses, your non-yahoo.com addresses will default to the preferences chosen for your yahoo.com email address.