I'm also using Mail::IMAPClient, then $client->select ( 'Inbox.Github' ) to choose a specific folder and $list = $client->search ( 'UNSEEN' ); to grab any unread messages from my github folder. I can then use $client->set_flag ( 'Seen', @list_of_msgs ) to mark a bunch of them as seen. It's a great way for me to automate the whole "I can ignore all of these github messages because that PR has already been approved" process.