Redmine

    # check if the attachment is match some ignored file

    Dir::Tmpname.create('tmpattach') do |tmpfilename|

      tmpfilenameextended = "#{tmpfilename}#{attachment.filename}"

      File.open(tmpfilenameextended, 'wb') do |file|

        file.write(attachment.body.decoded)

      end

      Dir['/home/redmine/redmine-ignored-attachments/*'].each do |ignoredf|

        if FileUtils.cmp(ignoredf, tmpfilenameextended)

          logger.info "MailHandler: ignoring attachment #{attachment.filename} matching #{ignoredf}"

          FileUtils.rm(tmpfilenameextended)

          return false

        end

      end

      FileUtils.rm(tmpfilenameextended)

    end