program MailSend; 

{$APPTYPE CONSOLE} 

uses
  windows,
  WinSock;

Function SendMail(Smtp: PChar; Port: dword; From, Dest, Data: PChar): boolean;
var 
FSocket: integer; 
HostEnt: PHostEnt;
SockAddrIn: TSockAddrIn; 
dBuff: PChar; 
dSize: dword; 
Str: array [0..255] of Char; 

function Success(): boolean; 
var 
Bytes: dword; 
RBuff: array [0..255] of Char; 
begin 
Result := false; 
Bytes := recv(FSocket, RBuff, 255, 0); 
if (Bytes = 0) or (Bytes = SOCKET_ERROR) then Exit; 
RBuff[3] := #0; 
if lstrcmp(RBuff, '220') = 0 then Result := true else 
if lstrcmp(RBuff, '250') = 0 then Result := true else 
if lstrcmp(RBuff, '354') = 0 then Result := true; 
end; 

begin 
Result := false; 
FSocket := socket(PF_INET, SOCK_STREAM, IPPROTO_TCP); 
SockAddrIn.sin_family := AF_INET; 
SockAddrIn.sin_port := htons(Port); 
SockAddrIn.sin_addr.s_addr := inet_addr(Smtp); 
if SockAddrIn.sin_addr.s_addr = INADDR_NONE then 
begin 
HostEnt := gethostbyname(Smtp); 
if HostEnt = nil then 
begin 
closesocket(FSocket); 
Exit; 
end; 
SockAddrIn.sin_addr.s_addr := PLongint(HostEnt^.h_addr_list^)^; 
end; 
if Connect(FSocket, SockAddrIn, SizeOf(SockAddrIn)) <> -1 then 
begin 
if Success then 
begin 
lstrcpy(Str, PChar('HELO ' + Smtp + #13#10#0)); 
send(FSocket, Str, lstrlen(Str), 0); 
if Success then 
begin 
lstrcpy(Str, PChar('MAIL FROM: ' + From + #13#10#0)); 
send(FSocket, Str, lstrlen(Str), 0); 
if Success then 
begin 
lstrcpy(Str, PChar('RCPT TO: ' + Dest + #13#10#0)); 
send(FSocket, Str, lstrlen(Str), 0); 
if Success then 
begin 
lstrcpy(Str, 'DATA'#13#10#0); 
send(FSocket, Str, lstrlen(Str), 0); 
if Success then 
begin 
dSize := lstrlen(Data); 
GetMem(dBuff, dSize + 6); 
lstrcpy(dBuff, Data); 
lstrcat(dBuff, #13#10'.'#13#10#0); 
send(FSocket, dBuff^, dSize + 6, 0); 
FreeMem(dBuff); 
if Success then 
begin 
lstrcpy(Str, 'QUIT'#13#10#0); 
send(FSocket, Str, lstrlen(Str), 0); 
Result := true; 
end; 
end; 
end; 
end; 
end; 
end; 
end; 
closesocket(FSocket); 
end; 

var 
WSAData: TWSAData; 
Mail, Data: string; 

begin 
Write('Send Mail to: '); 
ReadLn(Mail); 
Write('Enter Mail Text: '); 
ReadLn(Data); 
WSAStartup(257, WSAData); 
if SendMail('smtp.mail.ru', 25, 
'yandex@mail.ru',
PChar(Mail), PChar(Data)) then 
WriteLn('Mail sended') else WriteLn('Error on sending mail');
ReadLn;
WSACleanup();
end.