Failure Sending Maill In Asp.net Core

Question

User338455301 posted

HI, 
I use this code to send email in last and worked correctly but now when i send mail it show this error :
Error

no such is known

EmailService

 using (var client = new SmtpClient())
            {
                var credential = new NetworkCredential
                {
                    UserName = _configuration["EmailSender:Username"],
                    Password = _configuration["EmailSender:Password"]
                };

                client.Credentials = credential;
                client.Host = _configuration["EmailSender:Host"];
                client.Port = int.Parse(_configuration["EmailSender:Port"]);
                client.EnableSsl = false;
                try
                {
                    using (var emailMessage = new MailMessage())
                    {
                        emailMessage.To.Add(new MailAddress(email));
                        emailMessage.From = new MailAddress(_configuration["EmailSender:Email"]);
                        emailMessage.Subject = subject;
                        emailMessage.Body = message;
                        emailMessage.IsBodyHtml = true;
                        client.Send(emailMessage);
                    }
                }
                catch (Exception er)
                {

                    throw;
                }

AppSetting

 "EmailSender": {
    "Email": "[e-mail]",
    "Host": "smtp.abroon.net",
    "Port": 587,
    "EnableSSL": false,
    "UserName": "***********",
    "Password": "***********"

  },

what's problem ?

Answer 1

User475983607 posted

We need the actual error not a paraphrased error.  Usually port 587 is secured by SSL.  Contact your SMTP host for the proper configuration.  Also, I tried to ping smtp.abroon.net and the host does not exist.  Are you sure the host is correct?

Answer 2

User338455301 posted

 i have this :

and change host name in asppsetting to : Host: abroon.net 

but in send mail its how this error

InnerException = {"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 5.63.13.222:587"}

Answer 3

User475983607 posted

Your follow up post is not helpful. 

Let's try this again... What is the actual error?

Post 587 is usually secured with TLS.  Are you sure you do not need TLS?

I tried to ping and the host was not found.  Are you sure the host is correct?

Microsoft Windows [Version 10.0.18362.356]
(c) 2019 Microsoft Corporation. All rights reserved.

C:\WINDOWS\system32>ping smtp.abroon.net
Ping request could not find host smtp.abroon.net. Please check the name and try again.

C:\WINDOWS\system32>

telnet also failed.

C:\WINDOWS\system32>telnet smtp.abroon.net 587
Connecting To smtp.abroon.net...Could not open connection to the host, on port 587: Connect failed

C:\WINDOWS\system32>

Contact your host service for assistance.  This question has little to do with ASP.NET Core.

Answer 4

User753101303 posted

Hi,

Usually it means the request is sent successfully but the response is blocked (proxy, firewall etc...). AFAIK you should also enable SSL.

You are trying to access your own SMTP server from an hosting service?

Answer 5

User338455301 posted

yes i  trying to access your own SMTP server from an hosting service in local host,
what's problem ? 

Answer 6

User475983607 posted

what's problem ? 

Your are asking questions in the wrong support forum.  Contact your SMTP host for assistance as it seems your SMTP service is not available on the Internet.

Answer 7

User-474980206 posted

It’s unlikely that you domain is the smtp domain. You need to get the smtp settings for your mail provider. As a web mail provider they may not have smtp support.