:if ([/ip firewall address-list find list=torrent] != "") do={
 :local body "Lista hostow pobierajacych torrenty: \r\n";

 :foreach a in=[/ip firewall address-list find where list=torrent] do={  
  :local ip [/ip firewall address-list get $a address];
  :local mac "";
  :local hostname "";  
  :do {
  :set mac [/ip dhcp-server lease get value-name=mac-address number=[/ip dhcp-server lease find address=$ip]];
  } on-error={
  :do {  
  :set mac [/ip arp get value-name=mac-address number=[/ip arp find where address=$ip]];
  } on-error={}
  }
  :do {
  :set hostname [/ip dhcp-server lease get value-name=host-name number=[/ip dhcp-server lease find address=$ip]];  
  } on-error={}
  :set $body "$body$ip $mac $hostname\r\n";
  /ip firewall address-list remove numbers=[/ip firewall address-list find list=torrent address=$ip];
 }

 /tool e-mail send to="mail@example.com" subject="Torrenty" body="$body";
}