After you’ve created your email Signature in Outlook, you might notice it isn’t showing up when replying or forwarding messages. Here’s how to make sure it always automatically displays.
Open Outlook 2010 and go to File >> Options.
Outlook Options comes up. Click Mail >> Signatures.
Here I’ve already created my Groovy signature. Select the signature you want to use for New Messages, Replies and Forwards. Click OK.
In Outlook 2007, click Tools >> Options.
The Options window comes up. Click the Mail Format tab then Signatures.
Now just like in Outlook 2010, set Replies / Forwards to the signature you want to use.
You can also use multiple email signatures in case you want to use a different one when you reply or forward messages.