Part 2: Messaging in VB.NET

Generating QR Code in VB.NET Part 2: Messaging

Part 2: Messaging
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Using Internet Mail First, check to see if the SMTP service is already installed on your computer. The SMTP ser vice requires Microsoft Internet Information Services (IIS), so you need to add IIS, as well:
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Open Control Panel and launch Add Or Remove Programs. Click Add/Remove Windows Components. Scroll down and select Internet Information Services, then click Details. Select the SMTP service and click OK. Click Next and follow the prompts to complete the IIS/SMTP installation. After IIS is installed, open the Internet Information Services console from the Admin istrative Tools folder, right-click the Default Web Site, and choose Properties. tion Control group, clear the Anonymous Access option, and then click OK. Click OK again to close the properties for the Web site.
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7 Click the Directory Security tab, click Edit in the Anonymous Access and Authentica
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8 Right-click the SMTP virtual server and choose Properties, then click the Access tab.
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Click Authentication, clear the Anonymous Access option, select the Integrated Windows Authentication option, and click OK.
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9 Click Relay, click Only The List Below, click Allow All Computers Which Successfully
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Authenticate to Relay, Regardless of the List Above, and click OK. Click OK to close the properties for the SMTP server.
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10 In Outlook, open the Properties dialog box for the account for which you need to
specify the outgoing mail server and enter localhost (if you are using the SMTP service on a different computer on your network, enter that IP address instead).
11 Click More Settings to open the Internet E-mail Settings dialog box, then click the
Outgoing Server tab. Select the option My Outgoing Server (SMTP) Requires Authen tication, select the Log On Using option, and enter valid credentials (such as your own local logon account) in the User Name and Password fields, and click OK. Click Next, then Finish to complete the changes to the account settings. Note If other users on the network will be using the SMTP service on your computer to send outgoing mail, or you are sending through the SMTP service on another computer, select the Log On Using Secure Password Authentication (SPA) option on the Outgoing Server tab in the Outlook account settings. In step 7, you disabled anonymous access to the Default Web Site, which will help prevent infections by Web-borne viruses and worms. In steps 8 and 9, you restricted access to the SMTP service to only those clients who authenticate on the server, which should prevent spam relay through your computer.
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Part 2: Messaging
Microsoft Office Outlook 2003 Inside Out
Viewing Full Message Headers
Internet messages include routing information in their headers that specifies the sending address and server, the route the message took to get to you, and other data. In most cases, the header offers more information than you need, particularly if all you re interested in is the body of the message. However, if you re trying to troubleshoot a mail problem or identify a sender who is spamming you, the headers can be useful.
Track down spammers You can t always assume that the information in a message header is accurate. Spammers often spoof or impersonate another user or server or relay mail through another server to hide the true origin of the message. The header helps you identify where the mail came from so you can inform the server s administrator that the server is being used to relay spam. To notify the administrator, you can send a message to postmaster@<domain> where <domain> is the relaying mail server s domain, such as postmaster@wingtiptoys.com. Most ISPs also recognize an abuse mailbox, such as abuse@compuserve.com.
To view the full message header, right-click the message and choose Options to display the Message Options dialog box, shown in Figure 6-10. The message header appears in the Internet Headers box. You can highlight the text and press Ctrl+C to copy the text to the clipboard for inclusion in a note or other message.
Figure 6-10. View the full message header in the Message Options dialog box.
Part 2: Messaging
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Tip You can take several steps to reduce the amount of unsolicited e-mail you receive. See 8, Filtering, Organizing, and Using Automatic Responses, for details on blocking spam and filtering messages. 166
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