Full-featured email client with spam filter,support IMAP/POP/SMTP and Hotmail/MSN; Remote control messages on server to read ,to fetch and delete,etc,not only the pop messages but also the hotmail's messages; Be cooperative with virus killer software;You can set the time left to virus killer software to scan virus before saving it to mailbox file. The local smtp server can send mail to the destination direct and no delay with any smtp account. Edit any messages in your local mailbox,to modify the content,to delete attachments,etc,to send again; Encrypt your local messages and sending messages; Besides these, koomail's size is very small and it's speed is very fast.One time buy, free update to all version lifetime.