This can occur when users are trying to send their email through an IOS device where multiple emails have been mapped. These issues need to be understood clearly before being worked up. Our technicians at Yahoo technical support have a lot of experience in handling these issues. They will help you whenever you contact them for support. They can be reached through the Yahoo Technical Support Phone Number which is a toll free number. You can reach them round the clock for help. Their experience in handling such queries stands them in good stead when they face these issues. You can count on them for resolution of your technical difficulties.