Many rave about how good email program Bloomba is but what turned me away was its lack of support for IMAP folders.
People rave about Bloomba as it includes a fast search tool that automatically indexing your email as it comes in. Therefore you can easily find any email message based on simple searches. It’s so good, from what I understand that you don’t really need to sort email but can leave email in your in-box.
A bird tells me, however, that Bloomba’s Product Development team is actively working on full IMAP support and are planning implementing it shortly in an upcoming release.