通过Gmail和.NET 4发送电子邮件 [英] Sending Email via GMail and .NET 4
问题描述
请问.NET 4在发送电子邮件的任何问题？我有一个.NET 3.5解决方案，它是工作然后迁移的解决方案，以.NET 4中，并没有作品;什么都没有改变！
注意： 我得到这个异常：
System.Net.Mail.SmtpException：SMTP服务器要求安全连接或客户端未通过身份验证。服务器响应为：5.5.1要求进行验证。了解更多 在System.Net.Mail.MailCommand.CheckResponse（SmtpStatus code状态code，字符串响应）
在System.Net.Mail.MailCommand.Send（SmtpConnection康涅狄格州，字节]命令，从字符串）
在System.Net.Mail.SmtpTransport.SendMail（MailAddress发件人，收件人MailAddressCollection，字符串deliveryNotify，SmtpFailedRecipientException和放大器;除外）
在System.Net.Mail.SmtpClient.Send（MailMessage消息）
在...
这是我的code：
公共静态无效SendEmail（
此电子邮件的电子邮件）
{
如果（email.MailingSettings == NULL）抛出新ArgumentNullException（email.MailingSettings，指定email.MailingSettings）;
VAR设置= email.MailingSettings;
如果（string.IsNullOrEmpty（email.Sender））抛出新的ArgumentException（email.Sender，指定发件人）;
如果（email.Recipients == NULL）抛出新ArgumentNullException（email.Recipients，至少指定收件人）;
如果（email.Recipients.Length == 0）抛出新ArgumentNullException（email.Recipients，至少指定收件人）;
如果（string.IsNullOrEmpty（settings.SMTPHost））抛出新的ArgumentException（email.SMTPHost，指定email.SMTPHost）;
VAR邮件=新MailMessage（）;
如果（string.IsNullOrEmpty（email.SenderDisplayName））
mail.From =新MailAddress（email.Sender）;
其他
mail.From =新MailAddress（email.Sender，email.SenderDisplayName）;
如果（！string.IsNullOrEmpty（email.ReplyTo））
{
如果（string.IsNullOrEmpty（email.ReplyToDisplayName））
{
mail.ReplyToList.Add（新MailAddress（email.ReplyTo））;
}
其他
{
mail.ReplyToList.Add（新MailAddress（email.ReplyTo，email.ReplyToDisplayName））;
}
}
的foreach（在email.Recipients串接收方）
mail.To.Add（新MailAddress（收件人））;
mail.Subject = email.Subject;
mail.Body = email.Body;
mail.IsBodyHtml = settings.IsBodyHtml;
如果（email.CC =空＆安培;！＆安培; email.CC.Length大于0）
的foreach（在email.CC串CCI）
mail.CC.Add（CCI）;
如果（email.BCC =空＆安培;！＆安培; email.BCC.Length大于0）
的foreach（在email.BCC串BCCI）
mail.Bcc.Add（BCCI）;
如果（email.Attachments！= NULL）
的foreach（在email.Attachments VAR IFN）
mail.Attachments.Add（
新的附件（
新的MemoryStream（
ifn.Content）
ifn.FileName））;
VAR SMTPPORT = settings.SMTPPort＆GT; 0？ settings.SMTPPort：25;
VAR smtpClient =新SmtpClient（settings.SMTPHost，SMTPPORT）;
smtpClient.EnableSsl = settings.EnableSsl;
如果（！string.IsNullOrEmpty（settings.SMTPUser））
{
smtpClient.UseDefaultCredentials = FALSE;
VAR smtpPassword = settings.SMTPPassword == NULL？的String.Empty：settings.SMTPPassword;
的NetworkCredential netCred;
如果（string.IsNullOrEmpty（settings.SMTPDomain））
netCred =新的NetworkCredential（settings.SMTPUser，smtpPassword）;
其他
netCred =新的NetworkCredential（settings.SMTPUser，smtpPassword，settings.SMTPDomain）;
smtpClient.Credentials = netCred;
}
其他
smtpClient.Credentials = CredentialCache.DefaultNetworkCredentials;
smtpClient.Timeout = 180 * 1000;
smtpClient.DeliveryMethod = SmtpDeliveryMethod.Network;
ServicePointManager.ServerCertificateValidationCallback =
委托（对象S，X509证书证书，X509Chain链，SslPolicyErrors sslPolicyErrors）
{返回true; };
smtpClient.Send（邮件）;
}
这code是正确的和作品。问题是Gmail上侧和解决的（未检测到为何以及如何）。
Does .NET 4 has any problems in sending emails? I had a .NET 3.5 solution and it was working then migrated the solution to .NET 4 and It does not works; nothing changed!
Notes: I get this exception:
System.Net.Mail.SmtpException: The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.5.1 Authentication Required. Learn more at at System.Net.Mail.MailCommand.CheckResponse(SmtpStatusCode statusCode, String response)
at System.Net.Mail.MailCommand.Send(SmtpConnection conn, Byte[] command, String from)
at System.Net.Mail.SmtpTransport.SendMail(MailAddress sender, MailAddressCollection recipients, String deliveryNotify, SmtpFailedRecipientException& exception)
at System.Net.Mail.SmtpClient.Send(MailMessage message)
at ...
And this is my code:
public static void SendEmail(
this Email email)
{
if (email.MailingSettings == null) throw new ArgumentNullException("email.MailingSettings", "specify email.MailingSettings");
var settings = email.MailingSettings;
if (string.IsNullOrEmpty(email.Sender)) throw new ArgumentException("email.Sender", "specify a sender");
if (email.Recipients == null) throw new ArgumentNullException("email.Recipients", "specify at least a recipient");
if (email.Recipients.Length == 0) throw new ArgumentNullException("email.Recipients", "specify at least a recipient");
if (string.IsNullOrEmpty(settings.SMTPHost)) throw new ArgumentException("email.SMTPHost", "specify email.SMTPHost");
var mail = new MailMessage();
if (string.IsNullOrEmpty(email.SenderDisplayName))
mail.From = new MailAddress(email.Sender);
else
mail.From = new MailAddress(email.Sender, email.SenderDisplayName);
if (!string.IsNullOrEmpty(email.ReplyTo))
{
if (string.IsNullOrEmpty(email.ReplyToDisplayName))
{
mail.ReplyToList.Add(new MailAddress(email.ReplyTo));
}
else
{
mail.ReplyToList.Add(new MailAddress(email.ReplyTo, email.ReplyToDisplayName));
}
}
foreach (string recipient in email.Recipients)
mail.To.Add(new MailAddress(recipient));
mail.Subject = email.Subject;
mail.Body = email.Body;
mail.IsBodyHtml = settings.IsBodyHtml;
if (email.CC != null && email.CC.Length > 0)
foreach (string cci in email.CC)
mail.CC.Add(cci);
if (email.BCC != null && email.BCC.Length > 0)
foreach (string bcci in email.BCC)
mail.Bcc.Add(bcci);
if (email.Attachments != null)
foreach (var ifn in email.Attachments)
mail.Attachments.Add(
new Attachment(
new MemoryStream(
ifn.Content),
ifn.FileName));
var smtpPort = settings.SMTPPort > 0 ? settings.SMTPPort : 25;
var smtpClient = new SmtpClient(settings.SMTPHost, smtpPort);
smtpClient.EnableSsl = settings.EnableSsl;
if (!string.IsNullOrEmpty(settings.SMTPUser))
{
smtpClient.UseDefaultCredentials = false;
var smtpPassword = settings.SMTPPassword == null ? string.Empty : settings.SMTPPassword;
NetworkCredential netCred;
if (string.IsNullOrEmpty(settings.SMTPDomain))
netCred = new NetworkCredential(settings.SMTPUser, smtpPassword);
else
netCred = new NetworkCredential(settings.SMTPUser, smtpPassword, settings.SMTPDomain);
smtpClient.Credentials = netCred;
}
else
smtpClient.Credentials = CredentialCache.DefaultNetworkCredentials;
smtpClient.Timeout = 180 * 1000;
smtpClient.DeliveryMethod = SmtpDeliveryMethod.Network;
ServicePointManager.ServerCertificateValidationCallback =
delegate(object s, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors)
{ return true; };
smtpClient.Send(mail);
}
This code is correct and works. The problem was on GMail side and solved (not detected why and how).
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