paloalto
V2EX  ›  互联网

发现好知网的邮件无法取消订阅

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  •   paloalto · Aug 22, 2015 · 7664 views
    This topic created in 3934 days ago, the information mentioned may be changed or developed.
    很久之前做产品调研时注册了好知网,刚才收到他们的一封邮件,发现不能取消订阅,登录了好知网,设置中也未提供此功能。

    于是扫了他们的一下端口:



    25 端口是开放的,用了 Postfix ,连上后:




    其他尝试:




    还是做了基础防范的:

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