I having problem on sending message on the server. But in my local I can send message to the emails using the free smtp server.
Maybe there's a firewall or localhost is not accepted in the email policy?
Please advise.. thanks!
Code:
//send email
MailMessage objEmail = new MailMessage(new MailAddress(ConfigurationManager.AppSettings["emailAdd"].ToString()), new MailAddress(ConfigurationManager.AppSettings["emailAdd"].ToString()));
objEmail.Subject = "Test";
objEmail.Body = _Message;
objEmail.Priority = MailPriority.High;
SmtpClient SmtpMail = new SmtpClient();
SmtpMail.Host = "localhost";
SmtpMail.Send(objEmail);
Error:
System.Net.Mail.SmtpFailedRecipientException: Mailbox unavailable. The server response was: 5.7.1 Unable to relay for mae#yahoo.com
at System.Net.Mail.SmtpTransport.SendMail(MailAddress sender, MailAddressCollection recipients, String deliveryNotify, SmtpFailedRecipientException& exception)
at System.Net.Mail.SmtpClient.Send(MailMessage message)
This blog post answers basically the same question. Assuming you are sending through the IIS SMTP server, you may need to modify the Relay Restrictions to allow relaying from your IP address.
Few checks:
Check if your proxy is not blocked if using
Check that your server IP is in white-list, if it is being maintained on mail server
On mail server check if no password is required
Smtp server address is fine
Related
I desperately need help solving this issue. How can I get my deployed app to send emails to any address via SMTP?
I am developing a web-based sales-tracking application in Visual Studio 2015 (ASP.NET MVC). The site will be hosted on an Arvixe BusinessClass for Windows shared server. The domain of the server is mydomain.com, however this domain is actually hosted by one.com, which also provides mydomain.com email.
One of the functions of the site is to inform the line manager when a user reports a sale. The line manager is to be informed via email. The email account I am trying to send from is provided by one.com.
Using System.Net.Mail.MailMessage and sending via SmtpClient, trhe following code works in my development environment (Windows 10 pro) but not deployed (deployed on Arvixe BusinessClass for Windows shared server environment):
MailMessage message = new MailMessage();
message.To.Add("recipient#mydomain.com");
message.From = new MailAddress("sender#mydomain.com", "sender#mydomain.com");
message.IsBodyHtml = true;
message.Subject = "Subject";
message.Body = "Body<br />";
SmtpClient client = new SmtpClient();
client.DeliveryFormat = SmtpDeliveryFormat.SevenBit;
client.DeliveryMethod = SmtpDeliveryMethod.Network;
client.UseDefaultCredentials = false;
client.Host = "send.one.com";
client.Port = 587;
client.UseSSL = true;
client.Credentials = new NetworkCredential("sender#mydomain.com", "***");
client.Send(message);
On my Arvixe server I get the error:
"Unable to read data from the transport connection: net_io_connectionclosed".
Using this code I have also tried ports 465 and 25, with SSL set to true and false, and also host "mailout.one.com", without success.
I gave up and tried using MailKit with the following code:
MimeMessage message = new MimeMessage();
message.To.Add(new MailboxAddress("recipient#mydomain.com"));
message.From.Add(new MailboxAddress("sender#mydomain.com", "sender#mydomain.com"));
var bodyBuilder = new BodyBuilder();
bodyBuilder.HtmlBody = "htmlbody<br />";
bodyBuilder.TextBody = "textbody";
message.Body = bodyBuilder.ToMessageBody();
message.Subject = "Subject";
using (var client = new SmtpClient())
{
client.ServerCertificateValidationCallback = (s, c, h, e) => true;
client.Connect("send.one.com", 587, MailKit.Security.SecureSocketOptions.StartTls);
client.Authenticate("sender#mydomain.com", "***");
client.Send(message);
client.Disconnect(true);
}
Again it works in my development environment, but not in production. Here I get the error:
"The operation is not allowed on non-connected sockets".
Of note, both solutions work in deployed environment if I change the host to 127.0.0.1 and add an example#mydomain.com email account and connected user account in Arvixe, but only for external email addresses. Addresses ending in mydomain.com obviously get rerouted back to the server itself, as the server's domain is mydomain.com, but as the email provider is one.com and not the Arvixe server, the email doesn't get through.
Other things I have tried without success:
-Setting the SPF record for mydomain.com to include my server address, and my server IP address.
-Using an Office365 account on a different domain to send from (host "smtp.office365.com")
I desperately need help solving this issue. How can I get my deployed app to send emails to any address via SMTP?
Arvixe/One.com suggestions (from support tickets and live chat):
SMTP Authentication must be used.
The local mail server, or localhost must be used to send email via web script. (try xxx.win.arvixe.com, localhost, or 127.0.0.1 - port 25 or 26, or xxxsecuremail.win.arvixe.com - port 465 for secure mail)
The FROM email address, and SMTP Authentication email address, must be a local user on the local server.
If you have your own remote email server and intend to send emails via web script to email addresses that are local to your domain, then that mail domain needs to be removed from the local server (we have to do this) and you will have to use an account from another domain local to the server to send mail from. Otherwise any email going to the local domain will be delivered locally and not to your remote server.
Server: VDS
OS: Windows Server 2008 R2
Application: None
Library (DLL used by an application): Yes, C#
I am trying to send mail via C# using from what I read, gmail service. Basically just a test email to myself would be a start to know it works. If you have to ask, the information is stored in config.json file rather than directly in the code, hence the "AccountRecovery.AccountRecoveryConfig".
I cannot seem to get it to work! When using certain ports I get different errors!
PORT 465 - With Credentials
ERROR:
2016-02-05 02:52:33 - Command: ERROR: System.Net.Mail.SmtpException: Failure sending mail. ---> System.IO.IOException: Unable to read data from the transport connection: net_io_connectionclosed.
PORT 587 - With Credentials
ERROR:
2016-02-05 02:55:50 - Command: ERROR: 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
I have no idea what to do. Am I doing something wrong?
public static void SendEmail(string email)
{
MailMessage mail = new MailMessage(AccountRecovery.AccountRecoveryConfig.ServerEmailAddress, email);
SmtpClient client = new SmtpClient();
client.Timeout = 30000;
client.Host = AccountRecovery.AccountRecoveryConfig.HostSMTPServer;
client.Port = AccountRecovery.AccountRecoveryConfig.HostPort;
client.DeliveryMethod = SmtpDeliveryMethod.Network;
client.UseDefaultCredentials = false;
client.Credentials = new System.Net.NetworkCredential(AccountRecovery.AccountRecoveryConfig.ServerEmailAddress, AccountRecovery.AccountRecoveryConfig.ServerEmailPassword);
client.EnableSsl = true;
//client.ServicePoint.MaxIdleTime = 1;
mail.Subject = AccountRecovery.AccountRecoveryConfig.EmailSubjectLine;
mail.Body = AccountRecovery.AccountRecoveryConfig.EmailBodyLine;
mail.IsBodyHtml = false;
client.Send(mail);
}
The correct port is 587 for google, this error:
2016-02-05 02:55:50 - Command: ERROR: 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
You should give access to less secure applications. Here is the LINK where you can do it for your current logged google account.
I'm trying to send email with C#. Our email provider suggested that I use mail.example.com/exchange instead of mail.example.com
string mailServer;
mailServer = "mail.example.com";
mailServer = "mail.example.com/exchange";
SmtpClient smtpClient = new SmtpClient(mailServer);
smtpClient.DeliveryMethod = SmtpDeliveryMethod.Network;
smtpClient.Credentials = new NetworkCredential("username", "password");
smtpClient.Send("from#example.com", "to#foo.com", "subj", "email body");
When mailServer does not include a directory, after a long pause, I get:
System.Net.Mail.SmtpException: Failure sending mail. ---> System.Net.WebException: Unable to connect to the remote server ---> System.Net.Sockets.SocketException: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond
When mailServer does include a directory, with no pause at all, I get:
System.Net.Mail.SmtpException: Failure sending mail. ---> System.Net.WebException: The remote name could not be resolved: 'mail.example.com/exchange'
How can I send an email with C# for a FQDN that includes a directory?
SMTP doesn't support the concept of directories, so you might want to get an email provider that knows what they're talking about.
That seems more like a webmail address than an SMTP address. DNS isn't going to know what to do with that path. Verify that they are talking about SMTP connections (very likely they have an alternate port they use)
I'm sending a simple mail with attachment using SmtpClient but I get this error:
Mailbox unavailable. The server response was: not local host
example.com, not a gateway
System.Net.Mail.SmtpFailedRecipientException:
Mailbox unavailable.
The server response was: not local host example.com, not a gateway at
System.Net.Mail.SmtpTransport.SendMail(MailAddress sender, MailAddressCollection recipients, String deliveryNotify, SmtpFailedRecipientException& exception) at
System.Net.Mail.SmtpClient.Send(MailMessage message)
And the code:
public static void CreateMessageWithAttachment(byte[] compressed)
{
// Create a message and set up the recipients.
MailMessage message = new MailMessage(
"noreply#example.com",
"recepient#example.com",
"Hello.",
"How are you?");
// Create the file attachment for this e-mail message.
Stream attachStream = new MemoryStream(compressed);
Attachment attachment = new Attachment(attachStream, MediaTypeNames.Application.Octet);
message.Attachments.Add(attachment);
//Send the message.
SmtpClient client = new SmtpClient("123.12.12.123");
// Add credentials if the SMTP server requires them.
client.Credentials = CredentialCache.DefaultNetworkCredentials;
client.Send(message);
attachment.Dispose();
}
Of course the domain and IP is valid in the original code. I have tried using both "localhost" and IP but getting same error. Googling returned 3 results of which the helpful one seems to be in chinese and firewall preventing me from translating it.
Thanks in advance.
I've searched for: C# smtpclient error The server response was: not local host example.com, not a gateway and got 27K+ results.
If you are using localhost have a look at this page it says:
This is a relay error. Make sure you can relay through the SmtpMail.SmtpServer
either by your IP address, by your MailMessage.From address, or if you need to
authenticate, check out 3.8 How do I authenticate to send an email?
If SmtpMail.SmtpServer is set to "127.0.0.1" or "localhost", and you are using
the built in IIS SMTP Service, you can allow relaying for 127.0.0.1 by
1) Opening the IIS Admin MMC
2) Right-Clicking on the SMTP Virtual Server and selecting Properties
3) On the Access tab, click the Relay button
4) Grant 127.0.0.1 (or the IP address used by System.Web.Mail) to the
Computers list.
5) Close all dialogs
6) Restarting the SMTP Service
I am trying to send email using Exchange 2007 from a console app using the following code and I get this error message in the exception that gets thrown on the Send call.
The SMTP server requires a secure
connection or the client was not
authenticated. The server response
was: 5.7.1 Client was not
authenticated
MailMessage message = new MailMessage();
message.From = new MailAddress("from#example.com");
message.To.Add("to#domain.com");
message.Subject = "test";
SmtpClient smtp = new SmtpClient(ConfigurationUtil.SMTPServer);
smtp.Credentials = new System.Net.NetworkCredential("from#example.com", "password");
smtp.Send(message);
This worked on Exchange 2003.
This ended up being an Exchange 2007 issue and had nothing to do with code.
From the error message it seems like you need to connect to Exchange via SSL.
SmtpClient smtp = new SmtpClient(ConfigurationUtil.SMTPServer, 465);
Substitute that port number for the port that your Exchange server's secure connection is listening on.