Creating and Sending Messages
JavaMail messages are encapsulated within the abstract
Message class. Since JavaMail is a
transport-independent API, the default message class is very generic.
A standard Message has three
attributes: a subject, a set of headers, and content. The Message class defines get- and set- methods for each of these. In addition,
the Message class implements the
Part interface, which defines a set
of methods for dealing with message headers in an abstract fashion and
for associating content with the message. The actual message content
is contained in a javax.activation.DataHandler object, part of
the JavaBeans Activation Framework.
Message origins and destinations are set via Address objects. Since Address is abstract, subclasses are provided
to handle particular address types. The basic JavaMail implementation
includes an InternetAddress class
for SMTP mail and a NewsAddress
class for NNTP (Usenet) news. Note that, because there is no NNTP
service provider included with the JavaMail distribution, the InternetAddress class is of greater use to
most programmers.
The easiest way to create an InternetAddress is to instantiate a new
object, passing an RFC-822-formatted (user@host)
address into the constructor:
InternetAddress addr = new InternetAddress("adams@whitehouse.gov");If the address format is invalid, an AddressException is thrown. You can also
supply a personal name as a second parameter:
InternetAddress addr = new InternetAddress( "adams@whitehouse.gov", ...
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