Setting up a signature in Smartermail webmail is simple!
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Let's get started by logging in to your webmail account. You can typically reach your webmail login with IQComputing at http://webmail.yourdomain.com/ or alternatively via http://mail002.iqcomputing.net/
Once you are logged in select the Settings icon 
from the top navigation bar and then go ahead and select Signatures.
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Now click on the New Signature button.
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The Signature form should appear and you can now set up your own custom signature!
Once you are happy with your custom signature give it a name and click "Save" at the lower right of the signature form.
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You are now ready to add your signature to new outgoing messages. Let's go ahead and select your new signature from the signature drop down in a new message (doing this should add your saved custom signature to the new message window).
Go ahead and give your signature a test by drafting a test message to yourself to see it in action!