AntiSpam Filters
Microsoft Outlook has powerful built in antispam filters that can be taught which emails are spam, and which are not. Many of you have configured SpamTrap to control your spam. The filters in Outlook do not change your SpamTrap settings. Messages that are tagged by Spamtrap with "[Spam:" in the subject line will always be filtered into your Junk E-mail folder.
If Outlook thinks an email is spam, it will filter it into the Junk E-mail folder. By default, the Outlook filters will not automatically delete or reject emails; they will only filter them. We highly recommend that you do not create rules that automatically reject or delete email.
Messages that are filtered into the Junk E-mail folder are kept for 30 days and then deleted automatically. You can review them and move them to your inbox or any folder, or you can delete them. Messages in the "Junk E-Mail" folder that are older than 30 days will be automatically deleted.
Q&A
What if I use a rule in Outlook to route mail tagged spam to another folder?
We recommend removing that rule. That way, all junk mail is delivered to the same folder and there is less chance of confusion. We also recommend against making rules to filter, reject, or delete emails automatically.
Should I stop using SpamTrap and use the Outlook filters instead; or do I have to maintain spam controls in two places?
Absolutely not, you should not stop using SpamTrap; this is additional protection. But note that you will not really be maintaining spam control in two places, since the antispam filtering in Outlook is automatic. The one thing you may have to duplicate in Exchange is your whitelisting. In Outlook, you can right-click on a message, select Junk E-Mail, and select Add Sender (or Sender's Domain) to Safe Senders List.
How do I whitelist?
If you find a message in your Junk E-mail folder that is not spam, just right click on it, select "Junk E-mail", then select "Add Sender to Safe Senders List". From now on, emails from that sender will be delivered to your inbox.