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unit SMTPSendMail;
interface
uses Classes, SysUtils, IdMessage, IdSMTP, IdURI, IdTCPClient, IdDNSResolver;
procedure SendMail(const SMTPServer, EMailAddress, From, Subject, MailText : string); overload;
procedure SendMail(const SMTPServer, EMailAddress, From, Subject, MailText, Attachment : string; Username : string=''; Password : string=''); overload;
procedure ParseEmail(EmailAddress : string; var Username, Domain : string);
function ValidateEmailAddress(const EMailAddress : string; const DNSServer : string='') : boolean;
implementation
function CharPos(str : string; c : char) : integer;
var
i, iLen : integer;
begin
result := 0;
iLen := Length(str);
for i := 1 to iLen do
if str[i]=c then
begin
result := i;
break;
end;
end;
procedure ParseEmail(EmailAddress : string; var Username, Domain : string);
begin
Username := Copy(EmailAddress, 1, CharPos(EmailAddress, '@')-1);
Domain := Copy(EmailAddress, CharPos(EmailAddress, '@')+1,9999999);
end;
procedure SendMail(const SMTPServer, EMailAddress, From, Subject, MailText, Attachment : String; Username : string=''; Password : string='');
var
SMTP: TIdSMTP;
Msg: TIdMessage;
begin
SMTP := TIdSMTP.Create(nil);
try
SMTP.Username := Username;
SMTP.Password := Password;
Msg := TIdMessage.Create(SMTP);
Msg.AttachmentEncoding := 'MIME';
Msg.ContentType := 'text/plain';
msg.Encoding := meMIME;
msg.NoEncode := False;
Msg.NoDecode := False;
Msg.IsEncoded := True;
Msg.Subject := Subject;
with Msg.Recipients.Add do
begin
Address := EMailAddress;
Name := EMailAddress;
end;
Msg.From.Address := From;
Msg.From.Name := Copy(From,1,pos('@',From)-1);
with Msg.ReplyTo.Add do
begin
Address := From;
Name := Copy(From,1,pos('@',From)-1);
end;
Msg.Body.Text := MailText;
if Attachment <> '' then
TIdAttachment.Create(Msg.MessageParts, Attachment);
SMTP.Host := SMTPServer;
SMTP.Connect;
try;
SMTP.Send(Msg);
finally
SMTP.Disconnect;
end;
finally
SMTP.Free;
end;
end;
procedure SendMail(const SMTPServer, EMailAddress, From, Subject, MailText : string);
begin
SendMail(SMTPServer, EMailAddress, From, Subject, MailText, '','','');
end;
function ValidateEmailAddress(const EMailAddress : string; const DNSServer : string='') : boolean;
var
iPos, iResult : integer;
dns : TIdDNSResolver;
sResult, sUser, sDomain : string;
i : integer;
bFound : boolean;
begin
Result := False;
bFound := False;
iPos := CharPos(EMailAddress,'@');
if iPos > 0 then
begin
iPos := CharPos(EMailAddress,'.');
if iPos > 0 then
begin
if DNSServer = '' then
begin
Result := True;
exit;
end;
ParseEmail(EMailAddress, sUser, sDomain);
dns := TIdDNSResolver.Create(nil);
try
dns.AllowRecursiveQueries := True;
dns.Host := DNSServer;
dns.QueryRecords := [qtMX];
dns.ReceiveTimeout := 1000;
dns.Resolve(sDomain);
for i := 0 to dns.QueryResult.Count-1 do
begin
if dns.QueryResult[i].RecType = qtMX then
begin
sDomain := TMXRecord(dns.QueryResult[i]).ExchangeServer;
bFound := True;
break;
end;
end;
if bFound then
begin
with TIdTCPClient.Create(nil) do
try
Port := 25;
Host := sDomain;
Connect;
WriteLn('HELO '+sDomain);
sResult := ReadLn;
WriteLn('MAIL FROM:<'+EmailAddress+'>');
sResult := ReadLn;
WriteLn('RCPT TO:<'+EmailAddress+'>');
sResult := ReadLn;
iPos := CharPos(sResult,' ');
if iPos > 0 then
sResult := Copy(sResult,1,iPos-1);
iPos := CharPos(sResult,'-');
if iPos > 0 then
sResult := Copy(sResult,1,iPos-1);
iResult := StrToIntDef(sResult,0);
Result := iResult = 250;
finally
free;
end;
end;
finally
dns.Free;
end;
end;
end;
end;
end.
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AXMD: Code- durch Delphi-Tags ersetzt