Exchange has a built-in spam-filtering capability that can detect spam on two different levels: e-mails that are clearly spam will automatically bounce back to the sender, and e-mails that could be spam will be sent to the Junk E-mail folder.
Spam filtering, of course, will never be perfect so we encourage you to increase the detection accuracy by using Safe and Blocked Lists.
To Customize Your Junk E-mail Settings:
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Log in to Outlook Web Access (OWA) at http://webmailowa2010.exchangecentral.net and enter user information of the mailbox you wish to customize. |
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Click Options at the upper-right corner, followed by Show All Options. |
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Click Block or Allow on the left-side navigation menu. |
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Click the radio button next to Automatically filter junk e-mail. |
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In the Safe Senders List, enter the email addresses of senders whose e-mails should never be marked as spam. You can add one e-mail address at a time and click Add, or enter an entire domain name and click Add. You can also check the box next to Also trust e-mail from my Contacts. |
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In the Blocked Senders List, enter the email addresses of senders whose e-mails should always be marked as spam. You can add one e-mail address at a time and click Add, or enter an entire domain name and click Add. |
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In the Safe Recipients List, enter the email addresses other than your own Exchange address at which you receive legitimate e-mails. For example, if you belong to e-mail distribution lists, the Recipient is typically the name of the list and not your specific e-mail address. By entering the distribution list e-mail address in the Safe Recipients List, it's possible that these e-mails will be marked as spam. You can add one e-mail address at a time and click Add, or enter an entire domain name and click Add. |
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In the event you wish to be extremely aggressive in filtering spam, then you can check the box next to Treat all e-mail as junk unless it comes from someone in my Safe Senders or Safe Recipients lists, or from senders in my organizationDon't trust e-mail unless it comes from someone in my Safe Senders and Recipients list or local senders. |
In addition to the built-in filtering included in Exchange, you can also get the additional protection Google Message Filtering (GMF) provides free of charge. GMF is automatically activated for each Exchange account.