# Lines with a leading pid. Only handle >= 4-digit PIDs to avoid converting SMTP respose codes
s/^\s*(\d{4,})\s(?!(?:previous message|in\s|bytes remain in|SMTP accept process running))/new_value($1, "p%s", \$next_pid) . ' '/e;
# Lines with a leading pid. Only handle >= 4-digit PIDs to avoid converting SMTP respose codes
s/^\s*(\d{4,})\s(?!(?:previous message|in\s|bytes remain in|SMTP accept process running))/new_value($1, "p%s", \$next_pid) . ' '/e;