Auto Attach Signature in Outlook

Under Choose default signature, set the following options for your signature:

In the E-mail account drop-down box, choose an email account to associate with the signature. You can have different signatures for each email account.

If you want your signature added to all new messages by default, in the New messages drop-down box, select one of your signatures. If you don't want to automatically add a signature to new messages, choose (none). This doesn't add a signature to any messages you reply to or forward.

If you want your signature to appear in the messages you reply to and forward, in the Replies/forwards drop-down, select one of your signatures. Otherwise, accept the default option of (none).

Type a new signature to use in your email

Choose OK to save your new signature and return to your message. Outlook doesn't add your new signature to the message you opened in Step 1, even if you chose to apply the signature to all new messages. You'll have to add the signature manually to this one message. All future messages will have the signature added automatically. To add the signature manually, select Signature from the Message menu and then pick the signature you just created.