/// <summary>
/// 获取SMTP Client实例
/// </summary>
/// <param name="server"></param>
/// <param name="port"></param>
/// <returns></returns>
private SmtpClient GetSmtpClient(string server, int port)
{
//构造SMTP的连接器
SmtpClient smtp = new SmtpClient(server, port);
if (!string.IsNullOrEmpty(this.HostName))
{
FieldInfo field = smtp.GetType().GetField("localHostName", BindingFlags.Instance | BindingFlags.NonPublic);
if (field != null)
{
field.SetValue(smtp, this.HostName);
}
}
//超时设置
smtp.Timeout = this.Server.Timeout;
if (this.Server.EnableAuth)
{
//设置凭据
NetworkCredential credential = new NetworkCredential(this.Server.UserName, this.Server.Password);
if (this.Server.EnableSsl)
{
//SSL验证
smtp.Credentials = credential;
smtp.EnableSsl = this.Server.EnableSsl;
}
else
{
//普通验证
smtp.Credentials = credential.GetCredential(server, port, this.Server.AuthenticationType);
}
}
return(smtp);
}
public async Task sendEmail(string emailAddress, string title, string message)
{
try
{
var mailHtml = File.ReadAllText("HtmlTemplates/mail.html").Replace("${message}", message);
using (var stream = new MemoryStream(Encoding.UTF8.GetBytes(mailHtml)))
{
MailMessage mail = new MailMessage(new MailAddress("*****@*****.**", "Idea Stok Takip", Encoding.UTF8), new MailAddress(emailAddress));
mail.Subject = title;
mail.Body = message;
mail.IsBodyHtml = true;
mail.BodyEncoding = Encoding.UTF8;
mail.HeadersEncoding = Encoding.UTF8;
mail.SubjectEncoding = Encoding.UTF8;
mail.Body = mailHtml;
SmtpClient mailClient = new SmtpClient("mail.trabzon.bel.tr");// Bilinmiyor
mailClient.Port = 587;
mailClient.UseDefaultCredentials = false;
mailClient.Credentials = new NetworkCredential("*****@*****.**", "1Qaz2wsx*");// Şifre bilinmiyor
mailClient.EnableSsl = false;
var transportProp = mailClient.GetType().GetField("_transport", System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance);
var transport = transportProp.GetValue(mailClient);
var authModulesProp = transport.GetType()
.GetField("_authenticationModules", System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance);
var authModules = authModulesProp.GetValue(transport) as Array;
var activemodule = authModules.GetValue(authModules.Length - 1);
var newModules = Array.CreateInstance(activemodule.GetType(), 1);
newModules.SetValue(activemodule, 0);
authModulesProp.SetValue(transport, newModules);
mailClient.Send(mail);
await Task.CompletedTask;
}
}
catch (Exception e)
{
}
}
public static void ForceSmtpAuthentication(this SmtpClient smtpClient, SmtpAuthentication smtpAuthentication)
{
var transport = smtpClient.GetType().GetField("transport", BindingFlags.NonPublic | BindingFlags.Instance);
if (transport != null)
{
var authenticationModules = transport.GetValue(smtpClient).GetType().GetField("authenticationModules", BindingFlags.NonPublic | BindingFlags.Instance);
if (authenticationModules != null)
{
var modulesArray = authenticationModules.GetValue(transport.GetValue(smtpClient)) as Array;
if (modulesArray != null)
{
var smtpAuthenticationModule = modulesArray.GetValue((byte)smtpAuthentication);
modulesArray.SetValue(smtpAuthenticationModule, 0);
modulesArray.SetValue(smtpAuthenticationModule, 1);
modulesArray.SetValue(smtpAuthenticationModule, 2);
modulesArray.SetValue(smtpAuthenticationModule, 3);
}
}
}
}
/// <summary>
/// 发送邮件
/// </summary>
public Result Send(string title, string content, bool isHtml = true)
{
var rtv = new Result();
if (String.IsNullOrEmpty(SmtpHost))
{
rtv.error("必须提供发送邮件的smtp地址");
return(rtv);
}
if (_ToEmails.Count == 0)
{
rtv.error("需要设置发送到的邮件地址");
return(rtv);
}
MailMessage msg = null;
var smtp = new SmtpClient();
//SmtpConnection Hello 乱发名字
try {
var attr = smtp.GetType().GetField("clientDomain", Monitor.AllFlag);
attr.SetValue(smtp, ClientName);
} catch (Exception e) {
rtv.fail("无法设置客户端名称：" + e.Message, e.ToString());
return(rtv);
}
try {
int dataLen;
var msgRes = BuildMessage(title, content, out dataLen, isHtml);
if (msgRes.IsError)
{
msgRes.errorTo(rtv);
return(rtv);
}
msg = msgRes.Value;
var timeout = TimeoutMillisecond;
if (timeout == defaultTimeout)
{
//重新计算超时时间
timeout = Math.Max((dataLen / (50 * 1024)) * 1000, defaultTimeout);
}
while (_DKIM != null)
{
if (dataLen > DKIM_MaxLen)
{
break;
}
var res = _DKIM.Sign(msg);
if (res.IsError)
{
res.errorTo(rtv);
return(rtv);
}
break;
}
smtp.Host = SmtpHost;
smtp.Port = SmtpPort;
smtp.EnableSsl = SmtpSSL;
if (!String.IsNullOrEmpty(User))
{
smtp.Credentials = new NetworkCredential(User, Password);
}
smtp.Timeout = timeout;
if (OnSendBefore != null)
{
if (!OnSendBefore(smtp))
{
rtv.error("邮件发送前被取消");
return(rtv);
}
}
var task = smtp.SendMailAsync(msg);
var isout = !task.Wait(timeout);
if (isout || task.Exception != null)
{
smtp.SendAsyncCancel();
if (isout)
{
rtv.error("邮件发送超时");
return(rtv);
}
throw task.Exception;
}
return(rtv);
} catch (AggregateException ex) {
var e = ex.InnerException;
rtv.fail("邮件发送出错：" + e.Message, e.ToString());
return(rtv);
} catch (Exception e) {
rtv.fail("邮件发送异常：" + e.Message, e.ToString());
return(rtv);
} finally {
if (msg != null)
{
msg.Dispose();
}
if (smtp != null)
{
smtp.Dispose();
}
}
}
/// <summary>
/// 发送邮件
/// </summary>
public Result Send(string title, string content, bool isHtml = true)
{
var rtv = new Result();
if (_ToEmails.Count == 0)
{
rtv.error("需要设置发送到的邮件地址");
return(rtv);
}
if (String.IsNullOrEmpty(SmtpHost) && _ToEmails.Count != 1)
{
rtv.error("不提供smtp地址时只能提供一个收件地址");
return(rtv);
}
MailMessage msg = null;
var smtp = new SmtpClient();
//SmtpConnection Hello 乱发名字
try {
var attr = smtp.GetType().GetField("clientDomain", Monitor.AllFlag);
attr.SetValue(smtp, ClientName);
} catch (Exception e) {
rtv.fail("无法设置客户端名称：" + e.Message, e.ToString());
return(rtv);
}
try {
int dataLen;
var msgRes = BuildMessage(title, content, out dataLen, isHtml);
if (msgRes.IsError)
{
msgRes.errorTo(rtv);
return(rtv);
}
msg = msgRes.Value;
var timeout = TimeoutMillisecond;
if (timeout == defaultTimeout)
{
//重新计算超时时间
timeout = Math.Max((dataLen / (50 * 1024)) * 1000, defaultTimeout);
}
while (_DKIM != null)
{
if (dataLen > DKIM_MaxLen)
{
break;
}
var res = _DKIM.Sign(msg);
if (res.IsError)
{
res.errorTo(rtv);
return(rtv);
}
break;
}
if (String.IsNullOrEmpty(SmtpHost))
{
var hostRes = new DNS_MX().QueryOne(msg.To[0].Host);
if (hostRes.IsError)
{
hostRes.errorTo(rtv, "发送邮件失败：无法解析收件服务器");
return(rtv);
}
SmtpHost = hostRes.Value;
}
smtp.Host = SmtpHost;
smtp.Port = SmtpPort;
smtp.EnableSsl = SmtpSSL;
if (!String.IsNullOrEmpty(User))
{
smtp.Credentials = new NetworkCredential(User, Password);
}
smtp.Timeout = timeout;
//统一用7位，不然不支持的服务器没法统一进行签名
smtp.DeliveryFormat = SmtpDeliveryFormat.SevenBit;
if (OnSendBefore != null)
{
if (!OnSendBefore(msg, smtp))
{
rtv.error("邮件发送前被取消");
return(rtv);
}
}
//不能用异步方法，.Net SendAsync方法有bug，本应通过IsUnicodeSupported=ServerSupportsEai&&DeliveryFormat来判断是否支持utf-8，然而异步方法手贱直接用ServerSupportsEai来判断，导致DeliveryFormat无法控制编码方式！！表现为：支持SMTPUTF8的服务器100%不编码，不支持的100%编码。
smtp.Send(msg);
return(rtv);
} catch (AggregateException ex) {
var e = ex.InnerException;
rtv.fail("邮件发送出错：" + e.Message, e.ToString());
return(rtv);
} catch (Exception e) {
rtv.fail("邮件发送异常：" + e.Message, e.ToString());
return(rtv);
} finally {
if (msg != null)
{
msg.Dispose();
}
if (smtp != null)
{
smtp.Dispose();
}
}
}
