[Users] filter with count mails?

[moonkid at posteo.org]

I am sorry for asking but I wasn't able to search in the archive. I can
only click through the mailman-archive month-by-month. Is there another
portal for the archive with a search-field?

What is th english word for "Verarbeitungsregel"? ;)

I want to keep e.g. only 1000 mails in my trash-folder.
But there is no filter-rule for that.

I could do a external test but how (on ubuntu)?