With the upgrade to OTRS v. 3 the former "1-click spam" patch was no longer functional. This was an extremely useful tool for our agents and we have had numerous requests for it to be re-enabled.
The former obsolete patch/code is available at http://svn.wikimedia.org/svnroot/mediawiki/trunk/otrs/patches/50-one-click-spam.patch if that is of help. I am unsure of the reasons the code was no longer compatible post upgrade.
Version: wmf-deployment
Severity: enhancement