A signature is a way to include the same details on all your sent messages. An email signature in Yahoo Mail is automatically appended at the bottom of every message reply, forward, and new message  create. In a signature can include something special; users often add their name and contact information, such as email address, phone number, and a website address Or a designation in a signature. You can create easily in Yahoo messenger. 

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Things you can include in a signature:

· Your name, phone number, and other contact information.

·  A link to your website.

·  A personalized note to your recipients.

·  Your latest Tweet from Twitter.

Steps To Add SIGNATURE In Your Yahoo Mails

Add a Signature

·        Mouse over the Settings menu icon select Settings.

·        Click Accounts.

·        Click Primary Yahoo.

·        Select "Append a signature to the emails you send.“

·        You can also select "Include your latest Tweet from Twitter." The tweet can be deleted before you send a message if you don't want it included for that email.

·        Enter your signature text in the Signature field.

·        Click Save.

If you can't create signature in your account so that you can only dial our Yahoo mail support number +1-877-336-9533 to fix your issues and add your signature instantly. Our Yahoo mail certified expert are available 24*7 hours for yours. Or you can also visit our blog: http://yahootechhelp22.blogspot.in/p/home.html