digits_in_number(opt->total),
                                        opt->nr, opt->total);
                        subject = buffer;
-               } else if (opt->total == 0) {
+               } else if (opt->total == 0 && opt->subject_prefix && *opt->subject_prefix) {
                        static char buffer[256];
                        snprintf(buffer, sizeof(buffer),
                                        "Subject: [%s] ",
        if (opt->add_signoff)
                len = append_signoff(&msgbuf, &msgbuf_len, len,
                                     opt->add_signoff);
+       if (opt->show_log_size)
+               printf("log size %i\n", len);
+
        printf("%s%s%s", msgbuf, extra, sep);
        free(msgbuf);
 }