Jakarta Mailing Lists - For the various Java-related projects at Apache, includes subscription form and archives.
Java Boutique's JNews - Newsletter about the latest applets, industry news, and developer trends.
Java List Archives - Directory of Java-related mailing lists available from Sun.
JAVA/400 Mailing List - Discuss JAVA on and around the AS/400. AS/400 Java toolkit, and JDBC.
Java Open Source Mailing List Archive - A collection of popular Java Open Source project mailing list archives, including Cocoon, Maven, Ant, Axis, Fop, Lucene, POI, Log4J.
Java Open Source Mailing List Archive - A collection of archives of Open Source Java project mailing list. Lists include Tomcat, JBoss, Struts, iText.
Javalanche - Mailing list for developers of web applications using Java tools.
Java-Linux - For developers working with Blackdown's Linux ports, includes subscription form and archives.
JDJ Straight Talking - For readers of Java Developer's Journal interested in talking honestly about various subjects, includes subscription information and archives.
Servlet Mailing Lists - Collection of servlet-related mailing lists with searchable archives.
Swing - For basic swing-related questions, includes subscription form and archives.
Tech Tips - An electronic mailing sent to registered Java Developer Connection (JDC) members. Each mailing contains tips, techniques, and sample code on various topics of interest to developers using the Java programming language and platform. Also tips archive.