关于apache-james重发机制

[浮生醉]

我想测试jame搭建的一个邮件服务器的速率问题，但是 在配置config.xml文件时有一段配置不明白，求大虾指导，在线等、、、、
<mailet match="All" class="RemoteDelivery">
<outgoing> file://var/mail/outgoing/ </outgoing>
<!-- alternative database repository example below -->
<!--
<outgoing> db://maildb/spool/outgoing </outgoing>
-->

<!-- Delivery Schedule based upon RFC 2821, 4.5.4.1 -->
<!-- 5 day retry period, with 4 attempts in the first
hour, two more within the first 6 hours, and then
every 6 hours for the rest of the period. -->
<delayTime> 5 minutes </delayTime>
<delayTime> 15 minutes </delayTime>
<delayTime> 40 minutes </delayTime>
<delayTime> 2 hours </delayTime>
<delayTime> 3 hours </delayTime>
<delayTime> 6 hours </delayTime>
<maxRetries> 10</maxRetries>
还有在outgoing目录下每一次重发都会生成新的文件，这个是怎么回事啊？