public Task <MailSentStatus> Send(EMailEnvelop EMailEnvelop,
Byte NumberOfRetries = 3,
Boolean AutoStart = true)
{
var SendMailTask = new Task <MailSentStatus>(() => {
lock (this) {
switch (Connect())
{
case Sockets.TCP.TCPConnectResult.InvalidDomainName:
return(MailSentStatus.failed);
case Sockets.TCP.TCPConnectResult.NoIPAddressFound:
return(MailSentStatus.failed);
case Sockets.TCP.TCPConnectResult.UnknownError:
return(MailSentStatus.failed);
case Sockets.TCP.TCPConnectResult.Ok:
// 220 mail.ahzf.de ESMTP Postfix (Debian/GNU)
var LoginResponse = this.ReadSMTPResponse();
if (LoginResponse.StatusCode != SMTPStatusCode.ServiceReady)
{
throw new SMTPClientException("SMTP login error: " + LoginResponse.ToString());
}
switch (LoginResponse.StatusCode)
{
case SMTPStatusCode.ServiceReady:
#region Send EHLO
var EHLOResponses = SendCommandAndWaits("EHLO " + LocalDomain);
// 250-mail.ahzf.de
// 250-PIPELINING
// 250-SIZE 30720000
// 250-VRFY
// 250-ETRN
// 250-STARTTLS
// 250-AUTH LOGIN DIGEST-MD5 PLAIN CRAM-MD5
// 250-AUTH=LOGIN DIGEST-MD5 PLAIN CRAM-MD5
// 250-ENHANCEDSTATUSCODES
// 250-8BITMIME
// 250 DSN
if (EHLOResponses.Any(v => v.StatusCode != SMTPStatusCode.Ok))
{
var Error = EHLOResponses.Where(v => v.StatusCode != SMTPStatusCode.Ok).
FirstOrDefault();
if (Error.StatusCode != SMTPStatusCode.Ok)
{
throw new SMTPClientException("SMTP EHLO command error: " + Error.ToString());
}
}
#endregion
#region Check for STARTTLS
if (UseTLS == TLSUsage.STARTTLS)
{
if (EHLOResponses.Any(v => v.Response == "STARTTLS"))
{
var StartTLSResponse = SendCommandAndWait("STARTTLS");
if (StartTLSResponse.StatusCode == SMTPStatusCode.ServiceReady)
{
EnableTLS();
}
}
else
{
throw new Exception("TLS is not supported by the SMTP server!");
}
// Send EHLO again in order to get the new list of supported extensions!
EHLOResponses = SendCommandAndWaits("EHLO " + LocalDomain);
}
#endregion
#region Analyze EHLO responses and set SMTP capabilities
// 250-mail.ahzf.de
// 250-PIPELINING
// 250-SIZE 30720000
// 250-VRFY
// 250-ETRN
// 250-STARTTLS
// 250-AUTH LOGIN DIGEST-MD5 PLAIN CRAM-MD5
// 250-AUTH=LOGIN DIGEST-MD5 PLAIN CRAM-MD5
// 250-ENHANCEDSTATUSCODES
// 250-8BITMIME
// 250 DSN
var MailServerName = EHLOResponses.FirstOrDefault();
EHLOResponses.Skip(1).ForEach(v => {
#region PIPELINING
if (v.Response == "PIPELINING")
{
Capabilities |= SmtpCapabilities.Pipelining;
}
#endregion
#region SIZE
else if (v.Response.StartsWith("SIZE "))
{
Capabilities |= SmtpCapabilities.Size;
if (!UInt64.TryParse(v.Response.Substring(5), out _MaxMailSize))
{
throw new Exception("Invalid SIZE capability!");
}
}
#endregion
// else if (v.Response == "VRFY")
// Capabilities |= SmtpCapabilities.;
// else if (v.Response == "ETRN")
// Capabilities |= SmtpCapabilities.;
#region STARTTLS
if (v.Response == "STARTTLS")
{
Capabilities |= SmtpCapabilities.StartTLS;
}
#endregion
#region AUTH
else if (v.Response.StartsWith("AUTH "))
{
Capabilities |= SmtpCapabilities.Authentication;
SMTPAuthMethods ParsedAuthMethod;
var AuthType = v.Response.Substring(4, 1);
var AuthMethods = v.Response.Substring(5).Split(' ');
// GMail: "AUTH LOGIN PLAIN XOAUTH XOAUTH2 PLAIN-CLIENTTOKEN"
foreach (var AuthMethod in AuthMethods)
{
if (Enum.TryParse <SMTPAuthMethods>(AuthMethod.Replace('-', '_'), true, out ParsedAuthMethod))
{
if (AuthType == " ")
{
_AuthMethods |= ParsedAuthMethod;
}
}
else
{
_UnknownAuthMethods.Add(AuthMethod);
}
}
}
#endregion
#region ENHANCEDSTATUSCODES
if (v.Response == "ENHANCEDSTATUSCODES")
{
Capabilities |= SmtpCapabilities.EnhancedStatusCodes;
}
#endregion
#region 8BITMIME
if (v.Response == "8BITMIME")
{
Capabilities |= SmtpCapabilities.EightBitMime;
}
#endregion
#region DSN
if (v.Response == "DSN")
{
Capabilities |= SmtpCapabilities.Dsn;
}
#endregion
#region BINARYMIME
if (v.Response == "BINARYMIME")
{
Capabilities |= SmtpCapabilities.BinaryMime;
}
#endregion
#region CHUNKING
if (v.Response == "CHUNKING")
{
Capabilities |= SmtpCapabilities.Chunking;
}
#endregion
#region UTF8
if (v.Response == "UTF8")
{
Capabilities |= SmtpCapabilities.UTF8;
}
#endregion
});
#endregion
#region Auth PLAIN...
if (_AuthMethods.HasFlag(SMTPAuthMethods.PLAIN))
{
var AuthPLAINResponse = SendCommandAndWait("AUTH PLAIN " +
Convert.ToBase64String(ByteZero.
Concat(_Login.ToUTF8Bytes()).
Concat(ByteZero).
Concat(_Password.ToUTF8Bytes()).
ToArray()));
}
#endregion
#region ...or Auth LOGIN...
else if (_AuthMethods.HasFlag(SMTPAuthMethods.LOGIN))
{
var AuthLOGIN1Response = SendCommandAndWait("AUTH LOGIN");
var AuthLOGIN2Response = SendCommandAndWait(Convert.ToBase64String(_Login.ToUTF8Bytes()));
var AuthLOGIN3Response = SendCommandAndWait(Convert.ToBase64String(_Password.ToUTF8Bytes()));
}
#endregion
#region ...or AUTH CRAM-MD5
else if (_AuthMethods.HasFlag(SMTPAuthMethods.CRAM_MD5))
{
var AuthCRAMMD5Response = SendCommandAndWait("AUTH CRAM-MD5");
if (AuthCRAMMD5Response.StatusCode == SMTPStatusCode.AuthenticationChallenge)
{
var aa = Ext2.CRAM_MD5("<*****@*****.**>",
"tim", "tanstaaftanstaaf");
var a2 = Convert.ToBase64String(aa) == "dGltIGI5MTNhNjAyYzdlZGE3YTQ5NWI0ZTZlNzMzNGQzODkw";
var bb = Ext2.CRAM_MD5("<*****@*****.**>",
"alice", "wonderland");
var b2 = Convert.ToBase64String(bb) == "YWxpY2UgNjRiMmE0M2MxZjZlZDY4MDZhOTgwOTE0ZTIzZTc1ZjA=";
var cc = Ext2.CRAM_MD5("<*****@*****.**>", "ahzf", "ahzf2305!");
var zz = Ext2.CRAM_MD5(Convert.FromBase64String(AuthCRAMMD5Response.Response).ToUTF8String(),
_Login, _Password);
var AuthPLAINResponse = SendCommandAndWait(Convert.ToBase64String(zz));
}
}
#endregion
#region MAIL FROM:
foreach (var MailFrom in EMailEnvelop.MailFrom)
{
// MAIL FROM:<*****@*****.**>
/// 250 2.1.0 Ok
var MailFromCommand = "MAIL FROM: <" + MailFrom.Address.ToString() + ">";
if (Capabilities.HasFlag(SmtpCapabilities.EightBitMime))
{
MailFromCommand += " BODY=8BITMIME";
}
else if (Capabilities.HasFlag(SmtpCapabilities.BinaryMime))
{
MailFromCommand += " BODY=BINARYMIME";
}
var _MailFromResponse = SendCommandAndWait(MailFromCommand);
if (_MailFromResponse.StatusCode != SMTPStatusCode.Ok)
{
throw new SMTPClientException("SMTP MAIL FROM command error: " + _MailFromResponse.ToString());
}
}
#endregion
#region RCPT TO(s):
// RCPT TO:<*****@*****.**>
/// 250 2.1.5 Ok
EMailEnvelop.RcptTo.ForEach(Rcpt => {
var _RcptToResponse = SendCommandAndWait("RCPT TO: <" + Rcpt.Address.ToString() + ">");
switch (_RcptToResponse.StatusCode)
{
case SMTPStatusCode.UserNotLocalWillForward:
case SMTPStatusCode.Ok:
break;
case SMTPStatusCode.UserNotLocalTryAlternatePath:
case SMTPStatusCode.MailboxNameNotAllowed:
case SMTPStatusCode.MailboxUnavailable:
case SMTPStatusCode.MailboxBusy:
// throw new SmtpCommandException(SmtpErrorCode.RecipientNotAccepted, _RcptToResponse.StatusCode, mailbox, _RcptToResponse.Response);
case SMTPStatusCode.AuthenticationRequired:
throw new UnauthorizedAccessException(_RcptToResponse.Response);
//default:
// throw new SmtpCommandException(SmtpErrorCode.UnexpectedStatusCode, _RcptToResponse.StatusCode, _RcptToResponse.Response);
}
//Debug.WriteLine(_RcptToResponse);
});
#endregion
#region Mail DATA
// The encoded MIME text lines must not be longer than 76 characters!
/// 354 End data with <CR><LF>.<CR><LF>
var _DataResponse = SendCommandAndWait("DATA");
if (_DataResponse.StatusCode != SMTPStatusCode.StartMailInput)
{
throw new SMTPClientException("SMTP DATA command error: " + _DataResponse.ToString());
}
// Send e-mail headers...
if (EMailEnvelop.Mail != null)
{
EMailEnvelop.Mail.
Header.
Select(header => header.Key + ": " + header.Value).
ForEach(line => SendCommand(line));
//SendCommand("Message-Id: <" + (EMailEnvelop.Mail.MessageId != null
// ? EMailEnvelop.Mail.MessageId.ToString()
// : GenerateMessageId(EMailEnvelop.Mail, RemoteHost).ToString()) + ">");
SendCommand("");
// Send e-mail body(parts)...
//if (EMailEnvelop.Mail.MailBody != null)
//{
EMailEnvelop.Mail.Body.ToText(false).ForEach(line => SendCommand(line));
SendCommand("");
//}
}
else if (EMailEnvelop.Mail.ToText != null)
{
EMailEnvelop.Mail.ToText.ForEach(line => SendCommand(line));
SendCommand("");
}
#endregion
#region End-of-DATA
/// .
/// 250 2.0.0 Ok: queued as 83398728027
var _FinishedResponse = SendCommandAndWait(".");
if (_FinishedResponse.StatusCode != SMTPStatusCode.Ok)
{
throw new SMTPClientException("SMTP DATA '.' command error: " + _FinishedResponse.ToString());
}
#endregion
#region QUIT
/// QUIT
/// 221 2.0.0 Bye
var _QuitResponse = SendCommandAndWait("QUIT");
if (_QuitResponse.StatusCode != SMTPStatusCode.ServiceClosingTransmissionChannel)
{
throw new SMTPClientException("SMTP QUIT command error: " + _QuitResponse.ToString());
}
#endregion
break;
}
return(MailSentStatus.ok);
default:
return(MailSentStatus.failed);
}
}
});
if (AutoStart)
{
SendMailTask.Start();
}
return(SendMailTask);
}
public Task<MailSentStatus> Send(EMailEnvelop EMailEnvelop,
Byte NumberOfRetries = 3,
Boolean AutoStart = true)
{
var SendMailTask = new Task<MailSentStatus>(() => {
lock (this) {
switch (Connect())
{
case Sockets.TCP.TCPConnectResult.InvalidDomainName:
return MailSentStatus.failed;
case Sockets.TCP.TCPConnectResult.NoIPAddressFound:
return MailSentStatus.failed;
case Sockets.TCP.TCPConnectResult.UnknownError:
return MailSentStatus.failed;
case Sockets.TCP.TCPConnectResult.Ok:
// 220 mail.ahzf.de ESMTP Postfix (Debian/GNU)
var LoginResponse = this.ReadSMTPResponse();
if (LoginResponse.StatusCode != SMTPStatusCode.ServiceReady)
throw new SMTPClientException("SMTP login error: " + LoginResponse.ToString());
switch (LoginResponse.StatusCode)
{
case SMTPStatusCode.ServiceReady:
#region Send EHLO
var EHLOResponses = SendCommandAndWaits("EHLO " + LocalDomain);
// 250-mail.ahzf.de
// 250-PIPELINING
// 250-SIZE 30720000
// 250-VRFY
// 250-ETRN
// 250-STARTTLS
// 250-AUTH LOGIN DIGEST-MD5 PLAIN CRAM-MD5
// 250-AUTH=LOGIN DIGEST-MD5 PLAIN CRAM-MD5
// 250-ENHANCEDSTATUSCODES
// 250-8BITMIME
// 250 DSN
if (EHLOResponses.Any(v => v.StatusCode != SMTPStatusCode.Ok))
{
var Error = EHLOResponses.Where(v => v.StatusCode != SMTPStatusCode.Ok).
FirstOrDefault();
if (Error.StatusCode != SMTPStatusCode.Ok)
throw new SMTPClientException("SMTP EHLO command error: " + Error.ToString());
}
#endregion
#region Check for STARTTLS
if (UseTLS == TLSUsage.STARTTLS)
{
if (EHLOResponses.Any(v => v.Response == "STARTTLS"))
{
var StartTLSResponse = SendCommandAndWait("STARTTLS");
if (StartTLSResponse.StatusCode == SMTPStatusCode.ServiceReady)
EnableTLS();
}
else
throw new Exception("TLS is not supported by the SMTP server!");
// Send EHLO again in order to get the new list of supported extensions!
EHLOResponses = SendCommandAndWaits("EHLO " + LocalDomain);
}
#endregion
#region Analyze EHLO responses and set SMTP capabilities
// 250-mail.ahzf.de
// 250-PIPELINING
// 250-SIZE 30720000
// 250-VRFY
// 250-ETRN
// 250-STARTTLS
// 250-AUTH LOGIN DIGEST-MD5 PLAIN CRAM-MD5
// 250-AUTH=LOGIN DIGEST-MD5 PLAIN CRAM-MD5
// 250-ENHANCEDSTATUSCODES
// 250-8BITMIME
// 250 DSN
var MailServerName = EHLOResponses.FirstOrDefault();
EHLOResponses.Skip(1).ForEach(v => {
#region PIPELINING
if (v.Response == "PIPELINING")
Capabilities |= SmtpCapabilities.Pipelining;
#endregion
#region SIZE
else if (v.Response.StartsWith("SIZE "))
{
Capabilities |= SmtpCapabilities.Size;
if (!UInt64.TryParse(v.Response.Substring(5), out _MaxMailSize))
throw new Exception("Invalid SIZE capability!");
}
#endregion
// else if (v.Response == "VRFY")
// Capabilities |= SmtpCapabilities.;
// else if (v.Response == "ETRN")
// Capabilities |= SmtpCapabilities.;
#region STARTTLS
if (v.Response == "STARTTLS")
Capabilities |= SmtpCapabilities.StartTLS;
#endregion
#region AUTH
else if (v.Response.StartsWith("AUTH "))
{
Capabilities |= SmtpCapabilities.Authentication;
SMTPAuthMethods ParsedAuthMethod;
var AuthType = v.Response.Substring(4, 1);
var AuthMethods = v.Response.Substring(5).Split(' ');
// GMail: "AUTH LOGIN PLAIN XOAUTH XOAUTH2 PLAIN-CLIENTTOKEN"
foreach (var AuthMethod in AuthMethods)
{
if (Enum.TryParse<SMTPAuthMethods>(AuthMethod.Replace('-', '_'), true, out ParsedAuthMethod))
{
if (AuthType == " ")
_AuthMethods |= ParsedAuthMethod;
}
else
_UnknownAuthMethods.Add(AuthMethod);
}
}
#endregion
#region ENHANCEDSTATUSCODES
if (v.Response == "ENHANCEDSTATUSCODES")
Capabilities |= SmtpCapabilities.EnhancedStatusCodes;
#endregion
#region 8BITMIME
if (v.Response == "8BITMIME")
Capabilities |= SmtpCapabilities.EightBitMime;
#endregion
#region DSN
if (v.Response == "DSN")
Capabilities |= SmtpCapabilities.Dsn;
#endregion
#region BINARYMIME
if (v.Response == "BINARYMIME")
Capabilities |= SmtpCapabilities.BinaryMime;
#endregion
#region CHUNKING
if (v.Response == "CHUNKING")
Capabilities |= SmtpCapabilities.Chunking;
#endregion
#region UTF8
if (v.Response == "UTF8")
Capabilities |= SmtpCapabilities.UTF8;
#endregion
});
#endregion
#region Auth PLAIN...
if (_AuthMethods.HasFlag(SMTPAuthMethods.PLAIN))
{
var AuthPLAINResponse = SendCommandAndWait("AUTH PLAIN " +
Convert.ToBase64String(ByteZero.
Concat(_Login. ToUTF8Bytes()).
Concat(ByteZero).
Concat(_Password.ToUTF8Bytes()).
ToArray()));
}
#endregion
#region ...or Auth LOGIN...
else if (_AuthMethods.HasFlag(SMTPAuthMethods.LOGIN))
{
var AuthLOGIN1Response = SendCommandAndWait("AUTH LOGIN");
var AuthLOGIN2Response = SendCommandAndWait(Convert.ToBase64String(_Login. ToUTF8Bytes()));
var AuthLOGIN3Response = SendCommandAndWait(Convert.ToBase64String(_Password.ToUTF8Bytes()));
}
#endregion
#region ...or AUTH CRAM-MD5
else if (_AuthMethods.HasFlag(SMTPAuthMethods.CRAM_MD5))
{
var AuthCRAMMD5Response = SendCommandAndWait("AUTH CRAM-MD5");
if (AuthCRAMMD5Response.StatusCode == SMTPStatusCode.AuthenticationChallenge)
{
var aa = Ext2.CRAM_MD5("<*****@*****.**>",
"tim", "tanstaaftanstaaf");
var a2 = Convert.ToBase64String(aa) == "dGltIGI5MTNhNjAyYzdlZGE3YTQ5NWI0ZTZlNzMzNGQzODkw";
var bb = Ext2.CRAM_MD5("<*****@*****.**>",
"alice", "wonderland");
var b2 = Convert.ToBase64String(bb) == "YWxpY2UgNjRiMmE0M2MxZjZlZDY4MDZhOTgwOTE0ZTIzZTc1ZjA=";
var cc = Ext2.CRAM_MD5("<*****@*****.**>", "ahzf", "ahzf2305!");
var zz = Ext2.CRAM_MD5(Convert.FromBase64String(AuthCRAMMD5Response.Response).ToUTF8String(),
_Login, _Password);
var AuthPLAINResponse = SendCommandAndWait(Convert.ToBase64String(zz));
}
}
#endregion
#region MAIL FROM:
foreach (var MailFrom in EMailEnvelop.MailFrom)
{
// MAIL FROM:<*****@*****.**>
/// 250 2.1.0 Ok
var MailFromCommand = "MAIL FROM: <" + MailFrom.Address.ToString() + ">";
if (Capabilities.HasFlag(SmtpCapabilities.EightBitMime))
MailFromCommand += " BODY=8BITMIME";
else if (Capabilities.HasFlag(SmtpCapabilities.BinaryMime))
MailFromCommand += " BODY=BINARYMIME";
var _MailFromResponse = SendCommandAndWait(MailFromCommand);
if (_MailFromResponse.StatusCode != SMTPStatusCode.Ok)
throw new SMTPClientException("SMTP MAIL FROM command error: " + _MailFromResponse.ToString());
}
#endregion
#region RCPT TO(s):
// RCPT TO:<*****@*****.**>
/// 250 2.1.5 Ok
EMailEnvelop.RcptTo.ForEach(Rcpt => {
var _RcptToResponse = SendCommandAndWait("RCPT TO: <" + Rcpt.Address.ToString() + ">");
switch (_RcptToResponse.StatusCode)
{
case SMTPStatusCode.UserNotLocalWillForward:
case SMTPStatusCode.Ok:
break;
case SMTPStatusCode.UserNotLocalTryAlternatePath:
case SMTPStatusCode.MailboxNameNotAllowed:
case SMTPStatusCode.MailboxUnavailable:
case SMTPStatusCode.MailboxBusy:
// throw new SmtpCommandException(SmtpErrorCode.RecipientNotAccepted, _RcptToResponse.StatusCode, mailbox, _RcptToResponse.Response);
case SMTPStatusCode.AuthenticationRequired:
throw new UnauthorizedAccessException(_RcptToResponse.Response);
//default:
// throw new SmtpCommandException(SmtpErrorCode.UnexpectedStatusCode, _RcptToResponse.StatusCode, _RcptToResponse.Response);
}
//Debug.WriteLine(_RcptToResponse);
});
#endregion
#region Mail DATA
// The encoded MIME text lines must not be longer than 76 characters!
/// 354 End data with <CR><LF>.<CR><LF>
var _DataResponse = SendCommandAndWait("DATA");
if (_DataResponse.StatusCode != SMTPStatusCode.StartMailInput)
throw new SMTPClientException("SMTP DATA command error: " + _DataResponse.ToString());
// Send e-mail headers...
if (EMailEnvelop.Mail != null)
{
EMailEnvelop.Mail.
Header.
Select(header => header.Key + ": " + header.Value).
ForEach(line => SendCommand(line));
//SendCommand("Message-Id: <" + (EMailEnvelop.Mail.MessageId != null
// ? EMailEnvelop.Mail.MessageId.ToString()
// : GenerateMessageId(EMailEnvelop.Mail, RemoteHost).ToString()) + ">");
SendCommand("");
// Send e-mail body(parts)...
//if (EMailEnvelop.Mail.MailBody != null)
//{
EMailEnvelop.Mail.Body.ToText(false).ForEach(line => SendCommand(line));
SendCommand("");
//}
}
else if (EMailEnvelop.Mail.ToText != null)
{
EMailEnvelop.Mail.ToText.ForEach(line => SendCommand(line));
SendCommand("");
}
#endregion
#region End-of-DATA
/// .
/// 250 2.0.0 Ok: queued as 83398728027
var _FinishedResponse = SendCommandAndWait(".");
if (_FinishedResponse.StatusCode != SMTPStatusCode.Ok)
throw new SMTPClientException("SMTP DATA '.' command error: " + _FinishedResponse.ToString());
#endregion
#region QUIT
/// QUIT
/// 221 2.0.0 Bye
var _QuitResponse = SendCommandAndWait("QUIT");
if (_QuitResponse.StatusCode != SMTPStatusCode.ServiceClosingTransmissionChannel)
throw new SMTPClientException("SMTP QUIT command error: " + _QuitResponse.ToString());
#endregion
break;
}
return MailSentStatus.ok;
default:
return MailSentStatus.failed;
}}
});
if (AutoStart)
SendMailTask.Start();
return SendMailTask;
}
