DynDNS和邮件服务器

我已经build立了一个EXIM4的Ubuntu盒子来处理我的电子邮件，现在我只关心发送的电子邮件。 我的路由器pipe理我的DynDNS.com psuedo静态IP寻址。 端口25的端口转发是打开的，并通过端口扫描显示。 盒子上的firestarter防火墙显示访问尝试，并添加了一个许可规则。

传出的电子邮件似乎按我的意愿工作，并configuration为通过我的Gmail帐户发送。 问题是GMail每隔10-20分钟就发一封垃圾邮件，发送一个拒绝连接的传递状态通知消息。 这似乎是谷歌正在试图发送电子邮件我的根@ <dyndns帐户>帐户。

我应该如何克服这个问题？ 我怎样才能build立完整的进/出电子邮件访问？ 什么是最好的私人网站的行动，需要最less的电子邮件支持（例如我托pipe的MediaWiki等）。

编辑 – 添加了电子邮件的匿名副本

• 具有水平分割DNS或发夹式NAT的dynamicDNS
• 辅助DNS服务器？
• 在不停机的情况下将“A”logging更改为“CNAME”
• Godaddy托pipe与dynamicIP？
• ISC绑定支持GSS-TSIG DDNS更新？

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