Yahoo Mail is an email box that many people choose only after Gmail. Just like other email boxes, Yahoo Mail supports the user to set up a signature along with an outgoing message. You can write anything you want, be it a name, a phone number, an address or a quote you like …
An email signature in Yahoo Mail is automatically appended at the bottom of every reply, forward, and new message you create.
Add signature to Yahoo Mail on computer
Steps 1: Open and sign in to Yahoo Mail.
Steps 2: Click the Settings icon in the upper right of the screen.
Steps 3: From the menu, click More Settings.
Steps 4: In the left menu, click Writing email.
Steps 5: In the Writing emails section to the right of the menu, under Signature, locate the Yahoo Mail account you want to add a signature to and click the switch to the right of it. This action opens a text box beneath it.
In the text box, enter the email signature you want to be appended to email messages that will be sent from this account.
Steps 6: Create a signature. Click the text box below the account address, delete any text in it, and type in the signature that you want to use. This signature will appear at the bottom of every email that you send. Click Save to save.
Steps 7: When you have completed entering your signature and are satisfied with its appearance, click Back to inbox in the upper left.
All emails you compose will now include your signature!