Yahoo’s email editor enables you to resize and color text, but it still looks like colored text that’s larger than the rest. If you’d like to create email messages that stand out, emulate professional website designers and add a graphic header to your messages. The word “header” can also refer to extra data that resides in email messages. If you’d like to trace the route that a Yahoo email took to arrive in your inbox, you can do that by viewing the message’s header information. Tips Writer Bio

How to Put a Header in Yahoo Mail - 42