The "Vote for this feature" links in admin --> "EMail Handling Options Configurations" don't work
This was the method used to vote on issues before we used Jira Service Desk.
Users should check the backlog and vote there:
Beware of Atlassian Jira bugs for voting:
Users can't vote in the new issue view
Enable Votes on New Jira Issue View
Add clarity to features that are NOT available