%to(mail)% %from(mail)% %cc(mail)% etc. are always wrapped in fake <a> </a>.
this was intended to remove unwanted <a href="Mailto:"> .. </a> wrapping in the
receiving mail client. Unfortunately this also leads to breaking any added
links that wrap this variable.

E.g. the template:

<a href="http://test.com>%from(mail)%</a>

may be expanded to:
<a href="http://test.com><a>fred@test.com</a></a>

desired: a switch that disables the automatic wrapping in empty <a> tags to
disable this behavior.

Created an attachment (id=7654) [details]
0.9.4 Prerelease 48

Added the switch islinkable to suppress wrapping as described.

Usage:
%from(mail,islinkable)%
%to(mail,islinkable)%
%cc(mail,islinkable)%
%bcc(mail,islinkable)%
%identity(mail,islinkable)%

Example 1
<b>From:   </b>"%from(name)%" &lt;%from(mail,islinkable)%&gt;<br>

Output:
<b>From: </b>"Axel Grude" <a class="moz-txt-link-rfc2396E"
href="mailto:axel__grude@gmail.com">&lt;axel__grude@gmail.com&gt;</a><br>

Example 2
<b>From:   </b>"%from(name)%" <a
href="http://smarttemplate4.mozdev.org/templates.html?query=%from(mail,islinkable)%">
&lt;%from(mail,islinkable)%&gt;</a>

Output:
<b>From: </b>"Axel Grude" <a
href="http://smarttemplate4.mozdev.org/templates.html?query=axel__grude@gmail.com">&lt;axel__grude@gmail.com&gt;</a><br>