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CHAPTER 5 SE CURING WEB BROWS ERS AND E-MA IL
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Figure 5-11. Apple Mail s authentication settings
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Securing Entourage
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You can configure Entourage to use SSL in much the same way as Mail. Open your accounts (listed under the Tools menu in Entourage), and choose the account you want to use SSL to secure. On the Account Settings screen, click the Click Here for Advanced Receiving Options button, and then select the This Incoming Service Requires a Secure Connection (SSL) box. If your service provider runs IMAP or POP on customized ports, then select the Override Default IMAP option (or POP if you are using POP). You can always opt to use the Always Use Secure Password, which will force encryption on the password when you are checking e-mail (see Figure 5-12). Once you have set SSL for your incoming mail, click the Click Here for Advanced Sending Options button. This opens a screen with similar options, including both options for using SSL and the default SMTP port (see Figure 5-13). Remember, both of these settings are specific to your Internet service provider s mail server settings and need to be verified with them before they can be applied.
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Figure 5-12. Entourage advanced settings
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Figure 5-13. Entourage s SMTP settings One unintended benefit to using SSL is that there are a large number of Internet service providers that are now blocking access to mail being sent over port 25, the default port for SMTP. Once you have set your computer to send mail over SMTP using SSL, you will often no longer run into issues with getting blocked when trying to send mail. One unintended annoyance is that you now may have to manage certificates for your mail, by accepting, denying, or importing certificates. To add a different user s certificate to your cached certificates, open an e-mail that has been digitally signed, click the Info Bar, and click the View Details button. This opens a screen for viewing a user s certificate data. You can open the Certificates screen (as shown in Figure 5-14), which shows all your user certificates. By clicking a certificate and hitting the button in the certificates toolbar, you will be able to click View to see more information about the certificate. You can also click Delete to delete the certificate.
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Figure 5-14. Entourage s Certificates screen
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Note To view the certificates for a contact, go to Entourage s address book, double-click the person s
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name, and then click the Certificates tab.
The options in the Security preferences of Entourage (Figure 5-15) allow an administrator to tell Entourage to warn them when they are opening an attachment, warn them when an application other than Entourage attempts to access Entourage, and warn them when an application other than Entourage accesses the address book within Entourage. These help limit the ability for other applications to abuse Entourage if the system is infected with some form of malware.
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Figure 5-15. Entourage Security preferences
Fighting Spam
To quote Wikipedia, Spamming is the abuse of electronic messaging systems to indiscriminately send unsolicited bulk messages. Spam often involves sending identical or nearly identical messages to hundreds, thousands, and even millions of recipients. Addresses of recipients are often harvested from chain e-mail letters or web pages, obtained from databases, or guessed by using common names and domains. Spam is not just an irritation; it costs the corporations, educational institutions, and governmental agencies that are forced to deal with it hundreds of millions of dollars. Spam filters need to be trained. When a spam filter begins to filter spam, it may filter out e-mails that are not spam, called false positives. They are also likely to miss e-mails that might actually be spam. As you train your filter, you will be able to increase the intensity of the filter without increasing the number of false positives. A well-trained filter will minimize false positives while offering the best filtration available. Make sure to spend a little time with your filter to get it configured to maximize its potential. We ll cover more about how to train a spam filter later in this chapter. Every e-mail message has a collection of headers associated with it. These include Sender, CC (Carbon Copy), To, Date, and X-Spam-Status. There are servers that perform spam filtration and assign X-Spam headers. This is meant to make it easier for mail clients to scan messages for spam quickly. The X-Spam-Status contains, among other information, a numerical score (from 0 to 10) that indicates the likelihood that a message is spam. E-mail programs that support the use of the X-Spam headers will compare this score against the score that has been determined as an acceptable risk. The headers are able to be accessed using the rule sets of Entourage and Mail.app.
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