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## org.apache.commons.net.smtp
Class SimpleSMTPHeader

    java.lang.Object
      org.apache.commons.net.smtp.SimpleSMTPHeader

public class SimpleSMTPHeader
extends Object

This class is used to construct a bare minimum acceptable header for an email message. To construct more complicated headers you should refer to RFC 822. When the Java Mail API is finalized, you will be able to use it to compose fully compliant Internet text messages.

The main purpose of the class is to faciliatate the mail sending process, by relieving the programmer from having to explicitly format a simple message header. For example:

     writer = client.sendMessageData();
     if(writer == null) // failure
       return false;
     header =
        new SimpleSMTPHeader("foobar@foo.com", "foo@bar.com" "Just testing");
     header.addCC("bar@foo.com");
     header.addHeaderField("Organization", "Foobar, Inc.");
     writer.write(header.toString());
     writer.write("This is just a test");
     writer.close();
     if(!client.completePendingCommand()) // failure
       return false;

Author:
  Daniel F. Savarese
See Also:
  `SMTPClient`

Constructor Summary
`SimpleSMTPHeader(String from, String to, String subject)` Creates a new SimpleSMTPHeader instance initialized with the given from, to, and subject header field values.

Method Summary
`void` | `addCC(String address)` Add an email address to the CC (carbon copy or courtesy copy) list.
`void` | `addHeaderField(String headerField, String value)` Adds an arbitrary header field with the given value to the article header.
`String` | `toString()` Converts the SimpleSMTPHeader to a properly formatted header in the form of a String, including the blank line used to separate the header from the article body.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

Constructor Detail

### SimpleSMTPHeader

    public SimpleSMTPHeader(String from,
                            String to,
                            String subject)

  Creates a new SimpleSMTPHeader instance initialized with the given from, to, and subject header field values.

Parameters:
  `from` - The value of the `From:` header field. This should be the sender's email address.
  `to` - The value of the `To:` header field. This should be the recipient's email address.
  `subject` - The value of the `Subject:` header field. This should be the subject of the message.

Method Detail

### addHeaderField

    public void addHeaderField(String headerField,
                               String value)

  Adds an arbitrary header field with the given value to the article header. These headers will be written before the From, To, Subject, and Cc fields when the SimpleSMTPHeader is convertered to a string. An example use would be:

       header.addHeaderField("Organization", "Foobar, Inc.");

  Parameters:
    `headerField` - The header field to add, not including the colon.
    `value` - The value of the added header field.

### addCC

    public void addCC(String address)

  Add an email address to the CC (carbon copy or courtesy copy) list.

  Parameters:
    `address` - The email address to add to the CC list.

### toString

    public String toString()

  Converts the SimpleSMTPHeader to a properly formatted header in the form of a String, including the blank line used to separate the header from the article body. The header fields CC and Subject are only included when they are non-null.

  Returns:
    The message header in the form of a String.

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