find files older than certain date

 #find emails older than 6 months and move them to another dir
        f=`find $dpath/$email/Maildir/cur -mtime +180`
        if [ $? -eq 0 ]; then
                emaildes=$ddest/$email/Maildir/cur
                mkdir -p ${emaildes}
                mv -v $f $emaildes
        else
                echo "no files found"; continue
        fi