CODEWITHSUNDEEP
c#.netamazon-web-servicesamazon-ses
peter
peter

Reputation: 39

Why I cannot receive email by using AWS SES in . Net

I used the sample from AWS webpage to check whether I can receive an email by using AWS SES SDK.

It shows the email has been sent successfully, but no email received when I check my email account.

The sender's email has been verified.

The code is the same as the given simple. Only the email addresses are different.

When I paste the code in VS 2017, an error is thrown for Client.SendEmail().

I modified it as recommending to Client.SendEmailAsync(). Have no idea where the issue cloud be. 

using Amazon;
using System;
using System.Collections.Generic;
using Amazon.SimpleEmail;
using Amazon.SimpleEmail.Model;

namespace AmazonSESSample 
{
    class Program
    {

        static readonly string senderAddress = "*****";

        static readonly string receiverAddress = "******";


        static readonly string configSet = "ConfigSet";


        static readonly string subject = "Amazon SES test (AWS SDK for .NET)";


        static readonly string textBody = "Amazon SES Test (.NET)\r\n" 
                                        + "This email was sent through Amazon SES "
                                        + "using the AWS SDK for .NET.";


        static readonly string htmlBody = @"<html>
<head></head>
<body>
  <h1>Amazon SES Test (AWS SDK for .NET)</h1>
  <p>This email was sent with
    <a href='https://aws.amazon.com/ses/'>Amazon SES</a> using the
    <a href='https://aws.amazon.com/sdk-for-net/'>
      AWS SDK for .NET</a>.</p>
</body>
</html>";

        static void Main(string[] args)
        {

          using (
var client = new AmazonSimpleEmailServiceClient(RegionEndpoint.USEast1)) 
            {
                var sendRequest = new SendEmailRequest
                {
                    Source = senderAddress,
                    Destination = new Destination
                    {
                        ToAddresses =
                        new List<string> { receiverAddress }
                    },
                    Message = new Message
                    {
                        Subject = new Content(subject),
                        Body = new Body
                        {
                            Html = new Content
                            {
                                Charset = "UTF-8",
                                Data = htmlBody
                            },
                            Text = new Content
                            {
                                Charset = "UTF-8",
                                Data = textBody
                            }
                        }
                    },

                    ConfigurationSetName = configSet
                };
                try
                {
                    Console.WriteLine("Sending email using Amazon SES...");
                    var response = client.SendEmailAsync(sendRequest);
                    Console.WriteLine("The email was sent successfully.");
                }
                catch (Exception ex)
                {
                    Console.WriteLine("The email was not sent.");
                    Console.WriteLine("Error message: " + ex.Message);

                }
            }

            Console.Write("Press any key to continue...");
            Console.ReadKey();
        }
    }
}

Upvotes: 1

Views: 1121

Answers (1)

Brandon Minnick
Brandon Minnick

Reputation: 15340

Bug

The Main method is ending before the email is sent because we are not waiting for Task response to finish.

SendEmailAsync returns a Task, meaning these two lines of code are identical:

  1. var response = client.SendEmailAsync(sendRequest);

  2. Task response = client.SendEmailAsync(sendRequest);

Solutions

If you have the latest version of Visual Studio installed and have C#7.1 enabled, you can take advantage of async Task Main and use the await keyword which will tell the code to run SendEmailAsync on a different thread and Main won't end until SendEmail has completed.

If you are using an older version of Visual Studio, you can add .GetAwaiter().GetResult(), which will also ensure Main won't end until SendEmail has completed, but SendEmailAsync will lock the current thread.

C#7.1 and Above (Preferred)

static async Task Main(string[] args)
{

    using (var client = new AmazonSimpleEmailServiceClient(RegionEndpoint.USEast1)) 
    {
        var sendRequest = new SendEmailRequest
        {
            Source = senderAddress,
            Destination = new Destination
            {
                ToAddresses =
                new List<string> { receiverAddress }
            },
            Message = new Message
            {
                Subject = new Content(subject),
                Body = new Body
                {
                    Html = new Content
                    {
                        Charset = "UTF-8",
                        Data = htmlBody
                    },
                    Text = new Content
                    {
                        Charset = "UTF-8",
                        Data = textBody
                    }
                }
            },

            ConfigurationSetName = configSet
        };
        try
        {
            Console.WriteLine("Sending email using Amazon SES...");
            var response = await client.SendEmailAsync(sendRequest);
            Console.WriteLine("The email was sent successfully.");
        }
        catch (Exception ex)
        {
            Console.WriteLine("The email was not sent.");
            Console.WriteLine("Error message: " + ex.Message);

        }
    }

    Console.Write("Press any key to continue...");
    Console.ReadKey();
}

C#7.0 and below

static void Main(string[] args)
{

    using (var client = new AmazonSimpleEmailServiceClient(RegionEndpoint.USEast1)) 
    {
        var sendRequest = new SendEmailRequest
        {
            Source = senderAddress,
            Destination = new Destination
            {
                ToAddresses =
                new List<string> { receiverAddress }
            },
            Message = new Message
            {
                Subject = new Content(subject),
                Body = new Body
                {
                    Html = new Content
                    {
                        Charset = "UTF-8",
                        Data = htmlBody
                    },
                    Text = new Content
                    {
                        Charset = "UTF-8",
                        Data = textBody
                    }
                }
            },

            ConfigurationSetName = configSet
        };
        try
        {
            Console.WriteLine("Sending email using Amazon SES...");
            var response = client.SendEmailAsync(sendRequest).GetAwaiter().GetResult();
            Console.WriteLine("The email was sent successfully.");
        }
        catch (Exception ex)
        {
            Console.WriteLine("The email was not sent.");
            Console.WriteLine("Error message: " + ex.Message);

        }
    }

    Console.Write("Press any key to continue...");
    Console.ReadKey();
}

Upvotes: 3

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