mailman problem

[yu min]

Hi ,all

I have some problem in use mailman on redhat linux .
Problem like this:

Because the files in  dir
"/var/mailman/archives/private/maillist-name/attachments"
takes almost all disk spaces ,so the disk  of "/var" frequently became 99% in
use, so I want to know:

1. There is any set can do for delete the files which is  in dir
"/var/mailman/archives/private/maillist-name/attachments"  by self .

2. If the files can't deleted  by self , the files can be delete by manual ?