why not use Microsoft Word?

When you modify the signature using Microsoft Word, code that looked like this:

<div style="font-size: 0.698em; line-height: 1.2; color: gray; position: relative; top: -0.2em; display: block;"> Madison, WI  53717</div>

turns into something that looks like this:

<st1:place><st1:City><span style="font-family: &quot;Arial Narrow&quot;; color: gray;">Madison</span></st1:City><span style="font-family: &quot;Arial Narrow&quot;; color: gray;">, </span><st1:State><span style="font-family: "Arial Narrow"; color: gray;">WI</span></st1:State><span style="font-family: &quot;Arial Narrow&quot;; color: gray;">  </span><st1:PostalCode><span style="font-family: &quot;Arial Narrow&quot;; color: gray;">53717</span></st1:PostalCode></st1:place>

Please note that I didn't even edit anything: this happened just by opening the signature in Microsoft Word and saving it as a web page. Of the many problems with this, I'll just point out one: the <st1:place> tag is a special kind of formatting called a "smart tag" that only Microsoft programs generate and which is often blocked by spam filters or anti-virus programs -- even by companies that use Microsoft email programs.