XF 1.4 Prune Conversations


In my previous software one of the communication methods was sending mass PM's / conversation.

Now coming over to XF I see these have ended up in my conversation list (runs to over 11,000 pages :confused:), with it being around 300MB of my database size.

Has anyone any advice on:
  • Easiest way to prune - ideally I want to remove all conversations before a time limit (i.e before 2014) or even better limit people say to 50 and remove any extra?
  • Any add-ons that limit the number of conversations users can have? I'm having trouble finding anything.