You'll either have to upgrade to 2.1.7 or look at merging the Topic / Reply spammer classes into 2.1.6.
The latter shouldn't be that hard if you know
java and how to re-build jForum. Basically you need to modify them to get the posting text and add it as a parameter that can be used by the mail templates. Then modify the mail templates to use that in the body of the message.
[originally posted on jforum.net by monroe]