我认为没有这方面的财产。

I don't think there is a property for that.

什么你想解决的问题是什么？你需要在排队之前处理这些邮件吗？

What problem are you trying to solve? Do you need to process those mails before they are queued?

亲切的问候，

Henning

Kind regards,
Henning