Signature Inserts Above Outlook Template File, how to resolve?

[issinator]

I am trying to create a template that all users will be able to access. Here
is what the message looks like:

Dear Name,

Blah blah blah, yada yada yada.

Thank you for your time; we look forward to working with you in the
future.

Sincerely,

If the user has a signature, it puts it at the top of the email instead of
under the word "Sincerely". How can I make the signature appear at the bottom
of the email?