I'm using claws-mail and currently have 53,399 mails in my INBOX and 62,138 mails in my spam folder. I've got a few other mailboxes for mailing lists, some of t

I'm using claws-mail and currently have 53,399 mails in my INBOX and 62,138 mails in my spam folder. I've got a few other mailboxes for mailing lists, some of them 100k entries but I barely read them. I guess I could delete these but my mail folder is only 19.2 GB in size. The storage medium sizes increase so fast that I've never had to delete anything.