Potential new webmail attack

From Mexico.purplecow.org

This looks a lot like some sort of exploit hunt.

69.73.151.150 - - [10/Jan/2009:17:08:18 +1100] "GET /nonexistenshit HTTP/1.1" 404 212 "-" "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.5) Gecko/2008120122 Firefox/3.0.5"
69.73.151.150 - - [10/Jan/2009:17:08:18 +1100] "GET /mail/bin/msgimport HTTP/1.1" 404 216 "-" "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.5) Gecko/2008120122 Firefox/3.0.5"
69.73.151.150 - - [10/Jan/2009:17:08:18 +1100] "GET /bin/msgimport HTTP/1.1" 404 211 "-" "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.5) Gecko/2008120122 Firefox/3.0.5"
69.73.151.150 - - [10/Jan/2009:17:08:23 +1100] "GET /rc/bin/msgimport HTTP/1.1" 404 214 "-" "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.5) Gecko/2008120122 Firefox/3.0.5"
69.73.151.150 - - [10/Jan/2009:17:08:23 +1100] "GET /roundcube/bin/msgimport HTTP/1.1" 404 221 "-" "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.5) Gecko/2008120122 Firefox/3.0.5"
69.73.151.150 - - [10/Jan/2009:17:08:23 +1100] "GET /webmail/bin/msgimport HTTP/1.1" 404 219 "-" "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.5) Gecko/2008120122 Firefox/3.0.5"