hi, i'm sending a mail with attachment(1.pdf) but in mail it doesnt shows 1.pdf instead it shows some random file named "ATT008220.dat".

i'm using Rails 3.0 following is the code i'm using:

        @file = File.read('c:/1.pdf')
        @file.force_encoding('BINARY')
        attachment "application/octet-stream" do |a|
            a.body = @file
        end

anybody knows why its happening? any idea?

Thanks & Regards,

Harsh Raval.