if (mutt_is_mail_list (adr))
if (mutt_is_subscribed_list (adr))
check_for_mailing_list_addr (ADDRESS *adr, char *buf, int buflen){  for (; adr; adr = adr->next)  {    if (mutt_is_mail_list (adr))    {      if (buf && buflen)	snprintf (buf, buflen, "%s", adr->mailbox);      return 1;    }  }  return 0;}