If defined, EXPIREDATE sets the expiration date for messages in an archive. During an archive update, any messages with dates less than the EXPIREDATE are automatically removed. If a message to be added is older than EXPIREDATE, it is not added.
The syntax for EXPIREDATE is as follows:
DD Mon YY HH:MM:SS Zone
24 hour time must be used. The timezone is optional. If non-existent, the local zone is used. If a symbolic timezone is used (eg: "EST"), make sure it is defined in the TIMEZONES resource.
EXPIREDATE is useful if you want to insure messages older than a specified date do not get archived. For example, if you want to make sure that no message before 1997 is added, then define EXPIREDATE as follows:
<ExpireDate> 1 Jan 1997 00:00:00 </ExpireDate>
However, this specifies local time. It is possible that some message can get excluded that have a 1997 date (depending on what timezone you are in). The following is more accurate:
<ExpireDate> 1 Jan 1997 00:00:00 +0000 </ExpireDate>
<ExpireDate> 1 Jan 1997 00:00:00 GMT </ExpireDate>