Problem: Your Raley notification is sending all of the comments related to an issue, but comments are sorted in ascending order, i.e. from oldest to newest. How to reverse the order so, that the newest comments come first and the oldest would be in the end of the list?

Solution: Reversing of the order is done by applying some Velocity tricks. If you're not willing to dive into details, then take this as a working example and feel free to use in your notification.

<b>Comment History:</b><br>

<table border="0" cellspacing="10">
#set($max = $issue.fields.comment.comments.size() - 1)

#foreach($i in [ $max ..  0 ])
   #set ($comment = $issue.fields.comment.comments.get($i) )   
   <tr>
       <td valign="top"><b>$comment.author.displayName</b></td>
       <td valign="top" nowrap>$jirassimo.formatDate($comment.created, "yyyy-MM-dd HH:mm:ss")</td>
       <td>$!comment.body</td>
   </tr>
   #end  
#end
</table>

For those, interested in details, have a look