index.php?p=yahoosupport4 Simple MailTransfer Protocol or SMTP is a server provided by Yahoo so that you can use theemail application of your choice of co, computer or mobile device. You can sendmessages ... index.php?p=yahoosupport4&mod=blog_posts&id=3164 index.php?p=yahoosupport4&mod=blog_posts&id=3164