//Send Mail
public void SendMail(SMTPMailMessage mail)
{
try
{
MailMessage Newmail = new MailMessage();
SmtpClient SmtpServer = new SmtpClient(_strServer);
Newmail.From = new MailAddress(_strUserName);
Newmail.To.Add(mail.To);
Newmail.Subject = mail.Subject;
Newmail.Body = mail.Body;
System.Net.Mail.Attachment attachment;
attachment = new System.Net.Mail.Attachment(mail.AttachmentPath);
Newmail.Attachments.Add(attachment);
SmtpServer.EnableSsl = _useSSL;
SmtpServer.UseDefaultCredentials = true;
SmtpServer.Port = _intPort;
SmtpServer.Credentials = new System.Net.NetworkCredential(_strUserName, _strUserPassword);
SmtpServer.Send(Newmail);
}
catch (Exception ex)
{
Debug.WriteLine(ex.ToString());
return;
}
}
//--
//-- send mail with integrated retry mechanism
//--
//public bool SendMail(SMTPMailMessage mail)
//{
// int intRetryInterval = 333;
// try
// {
// SendMailInternal(mail);
// }
// catch (Exception ex)
// {
// _intRetries += 1;
// if (_intRetries <= _intMaxRetries)
// {
// Thread.Sleep(intRetryInterval);
// SendMail(mail);
// }
// else
// {
// throw;
// }
// }
// //Console.WriteLine("sent after " & _intRetries.ToString)
// _intRetries = 1;
// return true;
//}
//--
//-- send an email via trivial SMTP
//--
private void SendMailInternal(SMTPMailMessage mail)
{
IPHostEntry iphost = default(IPHostEntry);
TcpClient tcp = new TcpClient();
//-- resolve server text name to an IP address
try
{
iphost = Dns.GetHostByName(_strServer);
}
catch (Exception e)
{
throw new Exception("Unable to resolve server name " + _strServer, e);
}
//-- attempt to connect to the server by IP address and port number
try
{
tcp.Connect(iphost.AddressList[0], _intPort);
}
catch (Exception e)
{
throw new Exception("Unable to connect to SMTP server at " + _strServer.ToString() + ":" + _intPort.ToString(), e);
}
//-- make sure we get the SMTP welcome message
Command(tcp, "", "220");
Command(tcp, "HELO " + Environment.MachineName);
//--
//-- authenticate if we have username and password
//-- http://www.ietf.org/rfc/rfc2554.txt
//--
if ((_strUserName + _strUserPassword).Length > 0)
{
Command(tcp, "auth login", "334 VXNlcm5hbWU6");
//VXNlcm5hbWU6=base64'Username:'******'Password:'
Command(tcp, ToBase64(_strUserPassword), "235");
}
if (string.IsNullOrEmpty(mail.From))
{
mail.From = System.AppDomain.CurrentDomain.FriendlyName.ToLower() + "@" + Environment.MachineName.ToLower() + "." + _strDefaultDomain;
}
Command(tcp, "MAIL FROM: <" + mail.From + ">");
//-- send email to more than one recipient
string[] arRecipients = mail.To.Split(_strAddressSeperator.ToCharArray());
string strRecipient = null;
foreach (string strRecipient_loopVariable in arRecipients)
{
strRecipient = strRecipient_loopVariable;
Command(tcp, "RCPT TO: <" + strRecipient + ">");
}
Command(tcp, "DATA", "354");
StringBuilder objStringBuilder = new StringBuilder();
var _with1 = objStringBuilder;
//-- write common email headers
_with1.Append("To: " + mail.To + Environment.NewLine);
_with1.Append("From: " + mail.From + Environment.NewLine);
_with1.Append("Subject: " + mail.Subject + Environment.NewLine);
if (_blnPlainTextOnly)
{
//-- write plain text body
_with1.Append(Environment.NewLine + mail.Body + Environment.NewLine);
}
else
{
string strContentType = null;
//-- typical case; mixed content will be displayed side-by-side
strContentType = "multipart/mixed";
//-- unusual case; text and HTML body are both included, let the reader determine which it can handle
if (!string.IsNullOrEmpty(mail.Body) & !string.IsNullOrEmpty(mail.BodyHTML))
{
strContentType = "multipart/alternative";
}
_with1.Append("MIME-Version: 1.0" + Environment.NewLine);
_with1.Append("Content-Type: " + strContentType + "; boundary=\"NextMimePart\"" + Environment.NewLine);
_with1.Append("Content-Transfer-Encoding: 7bit" + Environment.NewLine);
// -- default content (for non-MIME compliant email clients, should be extremely rare)
_with1.Append("This message is in MIME format. Since your mail reader does not understand " + Environment.NewLine);
_with1.Append("this format, some or all of this message may not be legible." + Environment.NewLine);
//-- handle text body (if any)
if (!string.IsNullOrEmpty(mail.Body))
{
_with1.Append(Environment.NewLine + "--NextMimePart" + Environment.NewLine);
_with1.Append("Content-Type: text/plain;" + Environment.NewLine);
_with1.Append(Environment.NewLine + mail.Body + Environment.NewLine);
}
// -- handle HTML body (if any)
if (!string.IsNullOrEmpty(mail.BodyHTML))
{
_with1.Append(Environment.NewLine + "--NextMimePart" + Environment.NewLine);
_with1.Append("Content-Type: text/html; charset=iso-8859-1" + Environment.NewLine);
_with1.Append(Environment.NewLine + mail.BodyHTML + Environment.NewLine);
}
//-- handle attachment (if any)
if (!string.IsNullOrEmpty(mail.AttachmentPath))
{
_with1.Append(FileToMimeString(mail.AttachmentPath));
}
}
//-- <crlf>.<crlf> marks end of message content
_with1.Append(Environment.NewLine + "." + Environment.NewLine);
Command(tcp, objStringBuilder.ToString());
Command(tcp, "QUIT", "");
tcp.Close();
}
//--
//-- send an email via trivial SMTP
//--
private void SendMailInternal(SMTPMailMessage mail)
{
IPHostEntry iphost = null;
TcpClient tcp = new TcpClient();
//-- resolve server text name to an IP address
try
{
iphost = Dns.GetHostEntry(_strServer); // GetHostByName(_strServer);
}
catch (Exception e)
{
throw new Exception("Unable to resolve server name " + _strServer, e);
}
//-- attempt to connect to the server by IP address and port number
try
{
tcp.Connect(iphost.AddressList[0], _intPort);
}
catch (Exception e)
{
throw new Exception("Unable to connect to SMTP server at " + _strServer.ToString() + ":" + _intPort.ToString(), e);
}
//-- make sure we get the SMTP welcome message
//Interaction.Command(tcp, "", "220");
//Interaction.Command(tcp, "HELO " + Environment.MachineName);
Command(tcp, "", "220");
Command(tcp, "HELO " + Environment.MachineName, "250");
//--
//-- authenticate if we have username and password
//-- http://www.ietf.org/rfc/rfc2554.txt
//--
//if (Strings.Len(_strUserName + _strUserPassword) > 0)
if ((_strUserName + _strUserPassword).Length > 0)
{
//Interaction.Command(tcp, "auth login", "334 VXNlcm5hbWU6");
////VXNlcm5hbWU6=base64'Username:'******'Password:'
//Interaction.Command(tcp, ToBase64(_strUserPassword), "235");
//Command(tcp, "auth login", "334 VXNlcm5hbWU6");
//Command(tcp, ToBase64(_strUserName), "334 UGFzc3dvcmQ6");
Command(tcp, "auth login", "334 VXN");
Command(tcp, ToBase64(_strUserName), "334 UGF");
Command(tcp, ToBase64(_strUserPassword), "235");
}
if (string.IsNullOrEmpty(mail.From))
{
mail.From = System.AppDomain.CurrentDomain.FriendlyName.ToLower() + "@" + Environment.MachineName.ToLower() + "." + _strDefaultDomain;
}
//Interaction.Command(tcp, "MAIL FROM: <" + mail.From + ">");
Command(tcp, "MAIL FROM: <" + mail.From + ">", "250");
//-- send email to more than one recipient
string[] arRecipients = mail.To.Split(_strAddressSeperator.ToCharArray());
string strRecipient = null;
foreach (string strRecipient_loopVariable in arRecipients)
{
strRecipient = strRecipient_loopVariable;
//Interaction.Command(tcp, "RCPT TO: <" + strRecipient + ">");
Command(tcp, "RCPT TO: <" + strRecipient + ">", "250");
}
//Interaction.Command(tcp, "DATA", "354");
Command(tcp, "DATA", "354");
System.Text.StringBuilder objStringBuilder = new System.Text.StringBuilder();
var _with1 = objStringBuilder;
//-- write common email headers
_with1.Append("To: " + mail.To + Environment.NewLine);
_with1.Append("From: " + mail.From + Environment.NewLine);
_with1.Append("Subject: " + mail.Subject + Environment.NewLine);
//if (_blnPlainTextOnly)
//{
// //-- write plain text body
// _with1.Append(Environment.NewLine + mail.Body + Environment.NewLine);
//}
//else
{
string strContentType = null;
//-- typical case; mixed content will be displayed side-by-side
strContentType = "multipart/mixed";
//-- unusual case; text and HTML body are both included, let the reader determine which it can handle
if (!string.IsNullOrEmpty(mail.Body) & !string.IsNullOrEmpty(mail.BodyHTML))
{
strContentType = "multipart/alternative";
}
_with1.Append("MIME-Version: 1.0" + Environment.NewLine);
_with1.Append("Content-Type: " + strContentType + "; boundary=\"NextMimePart\"" + Environment.NewLine);
_with1.Append("Content-Transfer-Encoding: 7bit" + Environment.NewLine);
// -- default content (for non-MIME compliant email clients, should be extremely rare)
_with1.Append("This message is in MIME format. Since your mail reader does not understand " + Environment.NewLine);
_with1.Append("this format, some or all of this message may not be legible." + Environment.NewLine);
//-- handle text body (if any)
if (!string.IsNullOrEmpty(mail.Body))
{
_with1.Append(Environment.NewLine + "--NextMimePart" + Environment.NewLine);
_with1.Append("Content-Type: text/plain;" + Environment.NewLine);
_with1.Append(Environment.NewLine + mail.Body + Environment.NewLine);
}
// -- handle HTML body (if any)
if (!string.IsNullOrEmpty(mail.BodyHTML))
{
_with1.Append(Environment.NewLine + "--NextMimePart" + Environment.NewLine);
_with1.Append("Content-Type: text/html; charset=iso-8859-1" + Environment.NewLine);
_with1.Append(Environment.NewLine + mail.BodyHTML + Environment.NewLine);
}
//-- handle attachment (if any)
if (!string.IsNullOrEmpty(mail.AttachmentPath))
{
_with1.Append(FileToMimeString(mail.AttachmentPath));
}
}
//-- <crlf>.<crlf> marks end of message content
_with1.Append(Environment.NewLine + "." + Environment.NewLine);
//Interaction.Command(tcp, objStringBuilder.ToString());
//Interaction.Command(tcp, "QUIT", "");
Command(tcp, objStringBuilder.ToString(), "250");
Command(tcp, "QUIT", "");
tcp.Close();
}
//--
//-- send mail with integrated retry mechanism
//--
public bool SendMail(SMTPMailMessage mail)
{
int intRetryInterval = 333;
try
{
SendMailInternal(mail);
}
catch (Exception)
{
_intRetries += 1;
if (_intRetries <= _intMaxRetries)
{
//Thread.CurrentThread.Sleep(intRetryInterval);
Thread.Sleep(intRetryInterval);
SendMail(mail);
}
else
{
throw;
}
}
//Console.WriteLine("sent after " & _intRetries.ToString)
_intRetries = 1;
return true;
}
