The Yahoo!7 Dating Mailbox gives you the option to send your messages from any of your Yahoo! identities.

This service is "smart" because it knows which one of your identities to use as the default for each separate message. Here are two examples:

• Say you created an profile as "i_love_personals," and you receive a response to your profile. When you reply to the message, your Yahoo!7 Dating Mailbox automatically chooses "i_love_personals" from the pull-down menu of your identities in the "From:" field. In this situation, it's best not to change your identity because you don't want to confuse the person with whom you've already been corresponding.
• Say you're browsing the profiles, and you decide to reply to one that you like. The Yahoo!7 Dating Mailbox will automatically choose your main Yahoo!7 ID because this is the first time you'll be corresponding with this particular user. Feel free to choose another identity, especially if your main Yahoo!7ID includes all or parts of your real name.