We strongly recommend using a domain or gmail email address as the 'Admin Email' for your site and Mals cart. Both Yahoo and AOL have updated their DMARC policies, and suggest using a domain email for web scripts.
If you use an AOL or Yahoo email as their Admin Email or in Mals, the contact form, guestbook, order tracking, wholesale application and email a friend scripts may not work.
Go to Administration, Site Settings.
Verify that the information is correct (email address you wish to use).