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; }