ColdFusion Developer's Guide

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Beta Beta Beta Beta Beta Beta Beta Beta Beta Beta Adding a custom header to a message When the recipient of an e-mail message replies to the message, the reply is sent, by default, to the address specified in the From field of the original message. You can use to provide a Reply-To e-mail address that tells the mail client to override the value in the From field. Using cfmailparam, the reply to the following example is addressed to widget_master@YourCompany.com: Dan, Thanks very much for the sending the widget press release and graphic. I’m now the company’s Widget Master and am accepting e-mail at widget_master@YourCompany.com. See you at Widget World 2002! Jake NOTE You can combine the two uses of cfmailparam within the same ColdFusion page. Write a separate cfmailparam tag for each header and for each attached file. Receiving e-mail messages You create ColdFusion pages to access a Post Office Protocol (POP) server to retrieve e-mail message information. ColdFusion can then display the messages (or just header information), write information to a database, or perform other actions. The tag lets you add Internet mail client features and e-mail consolidation to applications. Although a conventional mail client provides an adequate interface for personal mail, there are many cases in which an alternative interface to some mailboxes is advantageous. You use cfpop to develop targeted mail clients to suit the specific needs of a wide range of applications. The cfpop tag does not work with the other major e-mail protocol, Internet Mail Access Protocol (IMAP). Here are three instances in which implementing POP mail makes sense: ■ If your site has generic mailboxes that are read by more than one person (sales@yourcompany.com), it can be more efficient to construct a ColdFusion mail front end to supplement individual user mail clients. 1428 Sending and Receiving E-Mail
Beta Beta Beta Beta Beta Beta Beta Beta Beta Beta ■ In many applications, you can automate mail processing when the mail is formatted to serve a particular purpose; for example, when subscribing to a list server. ■ If you want to save e-mail messages to a database. Using cfpop with your POP server is like running a query on your mailbox contents. You set its action attribute to retrieve either headers (using the GetHeaderOnly value) or entire messages (using the GetAll value) and assign it a name value. You use the name to refer to the record set that cfpop returns, for example, when using . To access a POP server, you also must define the server, username, and password attributes. NOTE If the cfpop tag encounters an error, such as an improperly formatted email message, when retrieving messages, it tries to ignore the error; it returns empty fields in the result structure and retrieves any available messages. For more information on syntax and variables, see CFML Reference. Using the cfpop tag Use the following steps to add POP mail to your application. To implement the cfpop tag in your application: 1. Choose the mailboxes to access within your ColdFusion application. 2. Determine which mail message components you must process: message header, message body, attachments, and so on. 3. Decide whether you must store the retrieved messages in a database. 4. Decide whether you must delete messages from the POP server after you retrieve them. 5. Incorporate the tag in your application and create a user interface for accessing a mailbox. 6. Build an application page to handle the output. Retrieved messages can include characters that do not display properly in the browser. You use the tag with the and functions to control output to the browser. These functions convert characters with special meanings in HTML, such as the less than (), and ampersand (&) symbols, into HTML-escaped characters, such as <, >, and &. The HTMLCodeFormat tag also surrounds the text in a pre tag block. The examples in this chapter use these functions. The cfpop query variables Like any ColdFusion query, each query returns variables that provide information about the record: Receiving e-mail messages 1429
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Beta Chapter 8: Creating ColdFusion
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Beta About resource and sandbox sec
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Index A access client variables 412
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authentication application-based ex
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cfexit tag about 43 behavior of 296
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SetVariable 103 StructClear 134 Str
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caching 1144 curve chart considerat
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web services and 1306 when to use 2
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forms for updating 584 insert form
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adding custom header 1428 attachmen
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in user-defined functions 222 infor
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esponding to messages from ColdFusi
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Internet applications 19 ColdFusion
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functions for 502 generating multi-
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described 1539 example 1544 onIncom
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unions 609 user guide 609 using 599
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text 1470 retrieving, e-mail messag
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about 37, 74, 324, 400, 404, 417 bu
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web services, consuming 1319 web se
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V validating data types 83 form fie
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type conversions 1304 web services,
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