Microsoft Junk Mail
Junk mail runs within Outlook and allows you to control the junk mail that comes to your Inbox. Set up your own safe senders, safe recipients, and blocked senders. You can also set senders, sender domains, groups or specific mailing lists to never be blocked.
The Junk Mail feature also lets you choose your own level of junk mail protection from low to high
Pure Message works at the server level, filtering most of the emails that may contain harmful attachments and preventing them from coming to your Inbox. Pure Message most likely will not filter out phishing or spoofed-sender emails.