This article explains how to create a signature for an email account in SmarterMail
1) Login to your SmarterMail by accessing the URL: http: //mail.domainname/
2) Proceed to Settings -> Signature -> Proceed to the Signature tab and click add
3) Then enter into Signature the Name and signature in the text box and Save.
4) Then proceed to the mappings tab and next to account click email on the combo box and select the new name Signature (eg. Test) that you have created and click Save
5) If you are composing a new email, the email will include the signature you have created as above