Commons Email 1.4 发布了，该项目是Apache的Commons子项目下的一个邮件客户端组件，它是基于JavaMail的，大大简化了邮件的收发操作。
与 1.3.3 版本比较主要改进包括如下几个方面：
== Compatibility ==
* Java 5 or later is required (unchanged since 1.3).
* JavaMail dependency has been upgraded to version 1.5.2,
as a consequence, the maven dependency has changed to:
== New Features ==
* Added getter for the bounce address of an email to class Email.
Issue: EMAIL-146. Thanks to Alexander Lehmann.
* Added support for mapping of content-ids to DataSource in "MimeMessageParser".
Issue: EMAIL-141. Thanks to Stephen Kruger.
== Updates ==
* Update Oracle JavaMail dependency from 1.4.5 to 1.5.2.
== Fixed Bugs ==
* "Email" threw an "EmailException" when trying to send the email if neither a from
nor bounce address was specified, although a "mail.from" property was set in the mail session.
Issue: EMAIL-149. Thanks to Richard DiCroce.
* "ImageHtmlEmail" failed to embed attachments if their data source name was null.
Issue: EMAIL-151. Thanks to Andreas Kohn.
* Html emails did not have the correct content-type set when using the Apache Geronimo
JavaMail implementation v1.8.x.
Issue: EMAIL-147. Thanks to Can Eskikaya.
* An "HtmlEmail" with both, an html and plain text content but no attachments or embedded
images will now be created with mimetype "multipart/alternative" instead of "multipart/mixed".
Issue: EMAIL-142. Thanks to Marcin Tomiak.