This question might be flagged as a duplicate But it is not. Because the code sends email successfully when using normal gmail account that ends with #gmail.com. The problem only happens when using G suit accounts that are custom and ends with #yourdomainname.com.
I am using this code to send email. My account has two-step verification so I created an app password for verification and use it to send email.
using (var mm = new MailMessage(PrivateSettings.SenderEmail, message.Destination))
{
mm.Subject = message.Subject;
mm.Body = message.Body;
mm.IsBodyHtml = true;
var smtp = new SmtpClient
{
Host = "smtp.gmail.com",
EnableSsl = true
};
var networkCred = new NetworkCredential(PrivateSettings.SenderEmail, PrivateSettings.EmailPassword);
smtp.UseDefaultCredentials = true;
smtp.Credentials = networkCred;
smtp.Port = 587;
smtp.Send(mm);
}
The above code sends email successfully when I use my normal gmail account which is se.natnael.zeleke#gmail.com.
But when I use one of my G Suit account , connect#tatarri.com , to send email it fails and shows this error message.
So my question is; is their additional configuration that should be done for G suit gmail accounts.
Additional Info.
I configured both email accounts to use app password. connect#tatarri.com is also registered as admin in my G suit account.
Both email accounts have their IMAP enabled in settings.
I bought tatarri.com domain name from namecheap.
Thank you.
The line:
smtp.UseDefaultCredentials = true;
Tells the SMTP client to use the default credentials of the currently logged in user. This is what you would use for a client application.
In your case, you want to specify credentials other than the current user's, so set it to false:
smtp.UseDefaultCredentials = false;
Related
Our application has the possibility to send emails via SmtpClient. One of our customer is trying to do so by using his gmail account and it fails resulting in a timeout. However, from our testing lab it works just fine (with another gmail account).
In the trace i can see that the server is not answering with Certificate, Server Key Exchange, Server Hello Done. And im wondering what can be the cause for this?
I also noticed in the traces, the customer is using TLSv1 so I tried to replicate the error on a Windows7 system but still it works for me.
oSmtp = new SmtpClient(this.host, this.port);
oSmtp.DeliveryMethod = SmtpDeliveryMethod.Network;
oSmtp.EnableSsl = ssl;
NetworkCredential oCredential = new NetworkCredential(this.userName, this.password);
oSmtp.Credentials = oCredential;
oSmtp.SendCompleted += new SendCompletedEventHandler(SendCompletedCallback);
string userState = null;
oSmtp.SendAsync(oMsg, userState);
As far as the code goes, enableSsl is true, the port is 587 and we also instructed our customer to check his gmail account and allow less secure applications.
We will ask the customer for more specific details and try to put more traces in our application, but i would like to know if there is anything that can prevent the server to answer with Certificate,...
Inspecting the traces revealed no significant difference between customers Client Hello and our test Client Hello.
Thanks!
This is a working sample i used few days ago:
string fromAddress = "fromaddress#gmail.com";
var toAddress = new MailAddress("fake#email.com", "To person");
const string fromPassword = "pass";
const string subject = "test";
const string body = "Hey now!!";
using (MailMessage mail = new MailMessage())
{
mail.From = new MailAddress(fromAddress);
mail.To.Add(toAddress);
mail.Subject = subject;
mail.Body = body;
mail.IsBodyHtml = true;
//mail.Attachments.Add(new Attachment("C:\\file.zip"));
using (SmtpClient smtp = new SmtpClient("smtp.gmail.com", 587))
{
smtp.UseDefaultCredentials = false;
smtp.Credentials = new NetworkCredential(fromAddress, fromPassword);
smtp.EnableSsl = true;
smtp.Send(mail);
}
}
also make sure to enable Less secure app access for the gmail you are using to send data:
My client has an account in Office365 and he recently added this account in the website he is using. Now he says that he cannot send mails using this account, whilst other accounts are OK. He says that TLS is enabled in the account. Anyhow, I am able to login to the mail account. I checked the settings and found that the SMTP settings are as follows:
Server name: smtp.office365.com
Port: 587
Encryption method: STARTTLS
This is a sample code that I am using to check.
String userName = "365useraccount";
String password = "password";
MailMessage msg = new MailMessage();
msg.To.Add(new System.Net.Mail.MailAddress("test#test.com"));
msg.From = new System.Net.Mail.MailAddress(userName);
msg.Subject = "Test Office 365 Account";
msg.Body = "Testing email using Office 365 account.";
msg.IsBodyHtml = true;
System.Net.Mail.SmtpClient client = new System.Net.Mail.SmtpClient();
client.Host = "smtp.office365.com";
client.UseDefaultCredentials = false;
client.Credentials = new System.Net.NetworkCredential(userName, password);
client.Port = 587;
client.EnableSsl = true;
try
{
client.Send(msg);
}
catch
{
}
I am getting an exception with message:
The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.7.57 SMTP; Client was not authenticated to send anonymous mail during MAIL FROM [BMXPR01CA0043.INDPRD01.PROD.OUTLOOK.COM]
However, I am able to send mails using other Office365 accounts.
Any help of idea would be greatly appreciated
I'm rather new to SMTP and IIS settings but according to the documentation on I've read the web this should be working.
What I'm trying to achieve:
To send an email from the server to a users email using an existing SMTP Relay Server.
What I have done:
In my IIS, for my site (ASP.NET), I have configured the SMTP E-mail.
I have entered:
A random E-mail address (it doesn't have to be an existing, right?)
A SMTP Server IP (in this case an IP to an external SMTP Relay Server)
A port number (25).
Autentication Settings to "Not required".
My method for sending an email looks like this:
public static void SendEmail()
{
var message = new MailMessage()
{
Subject = "Heading",
Body = "Body",
message.From = new MailAddress("test#test.com");
message.To.Add("A valid email address"); //My own email address
}
var smtpClient = new SmtpClient("SMTP-Relay-Server-IP", 25); //Same IP as the one in SMTP E-mail configuration in IIS for the site.
smtpClient.Send(message);
}
}
Facts/questions:
Is this correct? Is it correct to also put the Relay Server IP and Port number in the code as parameters in the new SmtpClient?
I don't get an error but I don't receive an email. (I am 100% sure that the "to-email" is correct.
What can be the reason for this not working? What am I missing or misunderstanding?
Wrap your smtpClient.Send(message); in a try/catch block and log any exceptions that are thrown.
A random E-mail address (it doesn't have to be an existing, right?)
That depends on your SMTP provider and configuration.
Without more information on your SMTP provider or an error message I doubt there's anything we can do for you.
MailMessage mail = new MailMessage("sendTo", "from");
SmtpClient smtp = new SmtpClient();
smtp.Credentials = new NetworkCredential("user", "pass");
smtp.Port = 25;
smtp.EnableSsl = true;
smtp.Host = "smtp.gmail.com";
mail.Body = "this my message";
smtp.Send(mail);
should be set out like this
I am stuck and not able to receive email from yahoo id(if the sender email id is of yahoo).
code is working fine not giving me any error and i am receiving email fromm gmail id.
i am using localhost (not in local machine on live server).
hosting server : smtp.snapgrid.com
also used authentication,enable ssl , using proper port for ssl.
on snapgrid i do check so i got is mail from yahoo is blocked and the message is,
message :
Type: blocked
Reason: 550 5.7.1 Unauthenticated email from yahoo.com is not accepted due to domain's
DMARC policy. Please contact administrator of yahoo.com domain if this was a legitimate
mail. Please visit http://support.google.com/mail/answer/2451690 to learn about DMARC
initiative.
please help...
code i used to send is(its working fine just giving for idea):
Method 1:
SmtpClient objSMTPClient = new SmtpClient();
objSMTPClient.Host = ConfigurationManager.AppSettings["strSMTPServer"];
string BODY_FORMAT = ConfigurationManager.AppSettings["EmailBodyContentFormat"];
MailMessage objMailMessage = new MailMessage(from.Trim(), to.Trim(), subject.Trim(), body.Trim());
objSMTPClient.UseDefaultCredentials = false;
if (BODY_FORMAT.ToUpper() == "HTML")
objMailMessage.IsBodyHtml = true;
else if (BODY_FORMAT.ToUpper() == "TEXT")
{
body = StripTags(body);
objMailMessage.IsBodyHtml = false;
objMailMessage.Body = body.ToString().Trim();
}
else
return false;
objSMTPClient.Send(objMailMessage);
return true;
Method 2:
SmtpClient oMail = new SmtpClient();
MailMessage msg = new MailMessage();
MailAddress Madd = new MailAddress(from, "sunil");
oMail.Host = "smtp.gmail.com";
oMail.Port = 587;
oMail.EnableSsl = true;
oMail.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network;
oMail.Credentials = new NetworkCredential("sunil123#mydomain.com", "******");
oMail.Timeout = 20000;
msg.From = Madd;
msg.Body = body.ToString();
msg.To.Add(to);
msg.Subject = subject;
msg.IsBodyHtml = true;
oMail.Send(msg);
return true;
both are working having no bug running without error....
If you are sending via a server belonging to someone like Yahoo, Google or Office365 they expect the sender name of the account to match that that you're sending using in the from address.
For example, this would work on a your local SMTP server:
Message.From = new MailAddress("GrandMasterFlush#domain.com");
However, to get it to send via someone like Yahoo would require you to send it like this:
Message.From = new MailAddress("GrandMasterFlush#domain.com", "Grandmaster Flush");
If the sender name provided does not exactly match that of the account the email will not get sent.
I am trying to send an email using the following very standard code. However, I get the error that follow...
MailMessage message = new MailMessage();
message.Sender = new MailAddress("sen#der.com");
message.To.Add("reci#pient.com");
message.Subject = "test subject";
message.Body = "test body";
SmtpClient client = new SmtpClient();
client.Host = "mail.myhost.com";
//client.Port = 587;
NetworkCredential cred = new NetworkCredential();
cred.UserName = "sen#der.com";
cred.Password = "correct password";
cred.Domain = "mail.myhost.com";
client.Credentials = cred;
client.UseDefaultCredentials = false;
client.Send(message);
Mailbox unavailable. The server
response was: No such
user here.
This recipient email address definitely works. To make this account work I had to do some special steps in outlook. Specifically, I had to do change account settings -> more settings -> outgoing server -> my outgoing server requires authentication & use same settings. I am wondering if there is some other strategy.
I think the key here is that my host is Server Intellect and I know that some people on here use them so hopefully someone else has been able to get through this. I did talk to support but they said with coding issues I am on my own :o
try this...
NetworkCredential cred = new NetworkCredential();
cred.UserName = "sen#der.com";
cred.Password = "correct password";
//cred.Domain = "mail.myhost.com";
... you should not need to provide the .Domain unless you are using Kerberos or some other complex authentication.
Edit...
Check out my extended answer. It has an example of how to send an email with authentication. It's also has SSL enabled so you may need to remove that part.
there is no mailbox called sen#der.com on server mail.myhost.com, check that