I'm looking for a java-based (preferable) mailing list application that allows users to opt-in/opt-out of mailing lists. Open-source is preferable but not mandatory.I'm looking for a java-based (preferable) maili
阅读背景：
什么是最好的基于Java的邮件列表应用程序允许选择加入/退出
来源：互联网
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