Why does software have to be "helpful?"

I copied some html into the Seamonkey mail editor.

This code

<ul type="square">
<li>Email: <a href="mailto:alan@clifford.ac">alan@clifford.ac</a></li>
<li>MSN instant messaging: msn@clifford.ac</li>
<li>Google Talk instant messaging: alanclifford@gmail.com</li>
<li>VoIP telephone on my laptop: sip:alan@clifford.ac</li>
<li>POTS to VoIP at a Guildford number: +44 1483 604719</li>
<li>Voicemail: on the VoIP address/number</li>
<li>Fax: +44 871 5042804</li>
<li>Mobile 'phone: +44 7980 418683 but in all probability it will either be switched off or will be using a local sim
with a yet unknown number</li>
</ul>


that should display as

• Email: alan@clifford.ac


• MSN instant messaging: msn@clifford.ac


• Google Talk instant messaging: alanclifford@gmail.com


• VoIP telephone on my laptop: sip:alan@clifford.ac


• POTS to VoIP at a Guildford number: +44 1483 604719


• Voicemail: on the VoIP address/number


• Fax: +44 871 5042804


• Mobile 'phone: +44 7980 418683 but in all probability it will either be switched off or will be using a local sim
  with a yet unknown number

(well almost like that as Blogger seems to be putting in extra blank lines)

became

<ul type="square">
<li>Email: <a href="mailto:alan@clifford.ac">alan@clifford.ac</a></li>
<li>MSN instant messaging: <a class="moz-txt-link-abbreviated"
href="mailto:msn@clifford.ac">msn@clifford.ac</a></li>
<li>Google Talk instant messaging: <a class="moz-txt-link-abbreviated"
href="mailto:alanclifford@gmail.com">alanclifford@gmail.com</a></li>
<li>VoIP telephone on my laptop: <a class="moz-txt-link-abbreviated"
href="mailto:sip:alan@clifford.ac">sip:alan@clifford.ac</a></li>
<li>POTS to VoIP at a Guildford number: +44 1483 604719</li>
<li>Voicemail: on the VoIP address/number</li>
<li>Fax: +44 871 5042804</li>
<li>Mobile 'phone: +44 7980 418683 but in all probability it will
either be switched off or will be using a local sim
with a yet unknown number</li>
</ul>


which displays as

• Email: alan@clifford.ac


• MSN instant messaging: msn@clifford.ac


• Google Talk instant messaging: alanclifford@gmail.com


• VoIP telephone on my laptop: sip:alan@clifford.ac


• POTS to VoIP at a Guildford number: +44 1483 604719


• Voicemail: on the VoIP address/number


• Fax: +44 871 5042804


• Mobile 'phone: +44 7980 418683 but in all probability it will
  either be switched off or will be using a local sim
  with a yet unknown number

Those are not email addresses.

The html also contained a link to a photograph on my server at home. This was changed to an in-line link and the photograph itself included in the email.