How to change format of "New discussion" email notification?

When in my vanilla community
www.iclickers.in any one posting any new discussion the automated email notifications that is being sent is showing all the HTML tag rather than showing actual HTML formating.

Can you kindly tell me how to configure that email sending system so that it shows email message in HTML format and dont show those html tags in the body.

I am refering one of my email that our users are receiving currently

tuhinmclick has started a new discussion

<font class="Apple-style-span" color="#ff6600">In the run-up to Global Wind Day on 15 June – the annual day promoting 
the power of the wind around the world – photographers are invited to 
let their imaginations take the lead and show wind energy technology in a
 new way, in line with the competition title, “Wind in Mind”.<br><br>The overall winning photo will also become part of an online professional photography collection, <a href="http://www.hardrainproject.com/">www.hardrainproject.com</a>, and be published in renewable energy newspaper ‘<a href="http://www.rechargenews.com/">Recharge</a>’ and in the European wind energy industry magazine <a href="http://www.ewea.org/wd"><em>Wind Directions</em></a>.<br><br></font><p><strong><font class="Apple-style-span" color="#ff6600">Terms and Conditions</font></strong></p>
<p><font class="Apple-style-span" color="#ff6600">The competition is open until <em><strong>6 May</strong><strong> 20:00 GMT</strong></em>.</font></p>
<p><font class="Apple-style-span" color="#ff6600">Entries will be accepted from now. This competition is open to 
participants from any country. Participants must be at least 18 years 
old at time of entry. There is no entry fee, and each participant can 
submit a maximum of three images to this contest. EWEA/GWEC/Recharge 
employees are not eligible to takepart in the competition, nor are their
 relatives or members of their families.<br><br></font><p><strong><font class="Apple-style-span" color="#ff6600">Technical Requirements</font></strong></p>
<p><font class="Apple-style-span" color="#ff6600">Digital
 editing is acceptable provided the look and style of the photo remain 
natural. EWEA has the right to reject any image considered excessively 
digitally altered. HDR images and stitched panoramas are allowed.</font></p>
<p><font class="Apple-style-span" color="#ff6600">Uploaded photos must have a minimum of 2000 pixel width or height.</font></p>
<p><font class="Apple-style-span" color="#ff6600">Files for upload must be larger than 1 MB and less than 10 MB.<br><br>Visit Competition entry Page:&nbsp;<a href="http://www.globalwindday.org/wind-in-mind/">http://www.globalwindday.org/wind-in-mind/</a></font></p></p>

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Follow the link below to check it out:
http://iclickers.in/iforum/discussion/10/wind-in-mind-a-new-international-photo-competition

Have a great day!