Hi David -

I understand that you would like to stop notifications of your postings from being sent to your wife's email address.

It sounds as if your wife's email account may be listed in your account as the primary address for notifications (password changes, posts, etc.)

Yahoo! sends all of your notifications to your primary email address. If you aren’t sure what your primary email address is or if you’d like to change it, please visit the help article, "How do I find or change my primary email address?" to learn more.

Hope you find this helpful!

Nixon