This question already has answers here:
Sending email in .NET through Gmail
(26 answers)
Closed 3 years ago.
What code should I use to send email in C#?
I tried to find a specific code so that I could send an email from my website.
And then I get an error:
"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"
public void sendEmail(string toEmail, string subject, string emailBody)
{
string senderEmail = "My_Email";
string senderPassword = "My_Email_Password";
SmtpClient client = new SmtpClient("smtp.gmail.com", 587);
client.EnableSsl = true;
client.Timeout = 500000;
client.DeliveryMethod = SmtpDeliveryMethod.Network;
client.UseDefaultCredentials = false;
client.Credentials = new NetworkCredential(senderEmail, senderPassword);
MailMessage mailMessage = new MailMessage(senderEmail, toEmail, subject, emailBody);
mailMessage.IsBodyHtml = true;
mailMessage.BodyEncoding = UTF8Encoding.UTF8;
client.Send(mailMessage);
}
Do I need to use Google API??
Its a security issue, Gmail by default prevents access for your e-mail account from custom applications. You can set it up to accept the login from your application.
You need to go to security settings at the followig link https://www.google.com/settings/security/lesssecureapps and enable less secure apps. So that you will be able to login from all apps.
Related
Good work everyone,
Gmail API also requires user approval. But I have no idea how to use the token. I have to send a control mail to the user. Can I do without tokens?
I am making request with HttpClient. I am not using credentials.json.
As a postman, I can take and take tokens, but the token must not be renewed.
Sorry for my English. Thanks
I tried sending mail with Smtp Server. But it is blocked for security reasons. The only healthy solution is to send mail via Gmail API.
Using SMTP:
public class EmailService
{
public Task Execute(string UserEmail, string Body, string Subject)
{
//enable less secure apps in account google with link
//https://myaccount.google.com/lesssecureapps
try
{
SmtpClient client = new SmtpClient();
client.Port = 587;
client.Host = "smtp.gmail.com";
client.EnableSsl = true;
client.Timeout = 1000000;
client.DeliveryMethod = SmtpDeliveryMethod.Network;
client.UseDefaultCredentials = false;
client.Credentials = new NetworkCredential("***email here****", "****password here****");
MailMessage message = new MailMessage("***email here****", UserEmail, Subject, Body);
message.IsBodyHtml = true;
message.BodyEncoding = UTF8Encoding.UTF8;
message.DeliveryNotificationOptions = DeliveryNotificationOptions.OnSuccess;
client.Send(message);
return Task.CompletedTask;
}
catch (Exception e)
{
Console.Error.Write(e);
return Task.CompletedTask;
}
}
}
Also as mentioned in comment, enable less secure apps in google account.
https://myaccount.google.com/lesssecureapps
hint: less secure can't be enabled for emails with 2-step verification.
This question already has answers here:
Gmail Error :The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.5.1 Authentication Required
(21 answers)
Closed 7 years ago.
I am trying to send confirmation email to user using smtp provided by google and test in my local machine. I have written the code and supply the settings.
SmtpClient client = SiteUtilites.GetMailClient();
MailAddress sender = new MailAddress(coreEmail, coreDisplayName);
MailAddress receiver = new MailAddress(model.EmailAddress, model.Firstname + " " +model.Lastname);
MailAddressCollection collection = new MailAddressCollection();
MailMessage mailMessage = new MailMessage(sender, receiver);
mailMessage.IsBodyHtml = true;
mailMessage.Body = "Hello";
client.Send(mailMessage);
This is the setting I have below
String smtpServer = ConfigurationManager.AppSettings["smtpServer"];
String smtpUsername = ConfigurationManager.AppSettings["smtpUsername"];
String smtpPassword = ConfigurationManager.AppSettings["smtpPassword"];
String smtpPort = ConfigurationManager.AppSettings["smtpPort"];
SmtpClient sc = new SmtpClient(smtpServer);
NetworkCredential nc = new NetworkCredential(smtpUsername, smtpPassword);
sc.UseDefaultCredentials = false;
sc.Credentials = nc;
sc.EnableSsl = true;
sc.Port = 587;
Do I need my site to run in https ? I just want to test my script in my local machine.
This is the error it gives me
The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.5.1 Authentication Required
It's possible that you are using weak password or using the default credentials.
see following links for more details:
[SOLVED] 5.5.1 Authentication Required with smtp.gmail.com
Sending email through Gmail SMTP server with C#
The SMTP server requires a secure connection or...
Gmail Error :The SMTP server requires a sec...
I've been struggeling a lot with this now.
I try to send mail with my mvc application using my google apps account. But I keep getting errors. It doesn't matter which settings I use. I tried using both port 465 and 587 with ssl and authentication turned on. With 465 I get Operation Timed Out and with 587 I get this message:
The SMTP server requires a secure connection or the client was not
authenticated. The server response was: 5.5.1 Authentication Required
I tried turning of the firewall with no luck. I have also tried to turn off 2-step authentication but I figured out that it wasn't even turned on.
I hope that you can help me
Regards
Here is the code as requested:
public static void SendMail(MailAddress from, MailAddress to, string subject, string body) {
MailMessage mail = new MailMessage();
mail.From = from;
mail.To.Add(to);
mail.Subject = subject;
mail.Body = body;
SmtpClient client;
if (Settings.Port != null)
client = new SmtpClient(Settings.Host, Int32.Parse(Settings.Port));
else
client = new SmtpClient(Settings.Host);
client.EnableSsl = Settings.UseSSL;
client.Timeout = 50000;
client.DeliveryMethod = SmtpDeliveryMethod.Network;
if (Settings.UseAuthentication) {
client.Credentials = new NetworkCredential(Settings.Username, Settings.Password);
client.UseDefaultCredentials = false;
}
client.Send(mail);
}
I have checked all obvius stuff like username and password (username is formed like user#domain.com). I've also stepped through the code to verify my settings class is working as it should
I found out what the problem was. client.UseDefaultCredentials = false; must go before the credentials is set. Now client.Sendmethod returns without exceptions.
This question already has answers here:
How to send email in ASP.NET C#
(14 answers)
Closed 7 years ago.
My client want to send E-mail through asp.net Web API. I am new in web services and have 0 knowledge of this please guide me how to achieve this task and if anyone can provide the code, there must be some web service available like this.
using (MailMessage mm = new MailMessage(txtEmail.Text, txtTo.Text))
{
mm.Subject = txtSubject.Text;
mm.Body = txtBody.Text;
mm.IsBodyHtml = false;
SmtpClient smtp = new SmtpClient();
smtp.EnableSsl = true;
smtp.Send(mm);
ClientScript.RegisterStartupScript(GetType(), "alert", "alert('Email sent.');", true);
}
The .NET mail API sends emails via SMTP. The ASP.NET Web API allows you to host a REST interface.
You said you know how to program with both, so do that.
Create your Web API method which receives the necessary arguments, exactly like you would for a normal method that will do your emailing duties for you. Then create your route to the method.
If you have issues with either not working, then write tests.
Documentation for Web API: http://www.asp.net/web-api/overview/getting-started-with-aspnet-web-api/tutorial-your-first-web-api
Documentation for SmtpClient: http://msdn.microsoft.com/en-us/library/system.net.mail.smtpclient(v=vs.110).aspx
# Call this function in your WebApi controller #
=========================================================
private void sendEmailViaWebApi()
{
string subject = "Email Subject";
string body = "Email body";
string FromMail = "shahid#reckonbits.com.pk";
string emailTo = "reciever#reckonbits.com.pk";
MailMessage mail = new MailMessage();
SmtpClient SmtpServer = new SmtpClient("mail.reckonbits.com.pk");
mail.From = new MailAddress(FromMail);
mail.To.Add(emailTo);
mail.Subject = subject;
mail.Body = body;
SmtpServer.Port = 25;
SmtpServer.Credentials = new System.Net.NetworkCredential("shahid#reckonbits.com.pk", "your password");
SmtpServer.EnableSsl = false;
SmtpServer.Send(mail);
}
Good day to everyone. I've writen a project based on asp.net mvc3. Part of project is based on sending emails from my application.
public void SendEmail(string address, string subject, string message, int id)
{
string email = "emailname#gmail.com";
string password = "somepassword";
var loginInfo = new NetworkCredential(email, password);
var msg = new MailMessage();
var smtpClient = new SmtpClient("smtp.gmail.com", 587);
msg.From = new MailAddress(email);
msg.To.Add(new MailAddress(address));
msg.Subject = subject;
msg.Body = message;
msg.IsBodyHtml = true;
msg.Attachments.Add(new Attachment(Server.MapPath("~/Content/StudentPdf/student" + id + ".pdf")));
smtpClient.EnableSsl = true;
smtpClient.UseDefaultCredentials = false;
smtpClient.Credentials = loginInfo;
smtpClient.Send(msg);
}
This code works locally, perfectly sending emails. But when I upload this to the hosting, it causes an error
the SMTP server requires a secure connection or the client was not
authenticated. The server response was: 5.5.1 Authentication Required.
I've tried to change port to 465, but then it will be get me an tcp_ip error on the hosting. And one more: and when users try to send emails from this mailbox google tell me that suspicious activity on the application. It's because my hosting in one country and I am in another country.
I have no idea what I have to do next. I've tried googling and found something about 2 level registration, but don't understand how I need implement it in my method.
I'm using arvixe hosting. Maybe others have the same problems?
Please login into your gmail account manually and allow the IP of your hosting under gmail settings.Thats why i think its working perfectly on your local.
Same happened with me and after doing this there was no problem.