I've fixed support for closing selected conversations (selected with SHIFT and arrow keys (UP, DOWN)) and added new actions (available from File menu in submenu Block selected). Those new actions have shortcuts that will allow easy selection of multiple conversations (or presence subscription requests) to block selected contacts or block servers of selected contacts.

@kobit Will this help with your issues with spam on your XMPP account? I will release a new beta build soon.

A new beta build has been released - 5.3.2-b167

I have installed the new beta but at the moment I do not have any spam messages. Cleared everything up last week and nothing new is showing up. So, I will test this new functionality when I have some more spam and will let you know.