Use Secure Protocols
Many mail servers now support Secure Sockets Layer (SSL) encryption
for particular protocols (including SMTP, POP, and IMAP). If your
server supports SSL, your JavaMail application can use it as well,
reducing the likelihood of third parties eavesdropping on your
communications. To do this, you need to create a JavaMail
Session
object that uses the Java Secure Socket Extension (JSSE) system,
which is included in Java Development Kit (JDK) 1.4 or is available
as an add-on for earlier Java 2 implementations.
To use JSSE with a particular protocol, you need to install the JSSE
provider according to the instructions included with the JSSE
installation. You can then create an SSL-aware session by setting the
following three properties within the Session
objects.
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Property |
Value |
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|
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The remote port for the new socket factory |
You will also have to set the default port for the protocol if it is not the standard port for the protocol.
If the remote server uses a server certificate not supported by the JSSE implementation, you will need to add the remote certificate to your local set of trusted root certificates. See the JSSE documentation for more information.