Sending different mail content to same recipient does not work well

[SRossi77]

Issue Summary

I am using a send grid method to send multiple files to same recipient by using substitutions tags.
I need this to work because sometimes i need to send multiple emails with different content to same recipient.

I am using Rest Request:
IRestResponse response = new RestClient(SendGridClientUrl).Execute(request);

Request Object:( Custom Request for send grid )
EmailAddress fromMail = new EmailAddress("no-reply@test.com", "");
List emails = new List()
{
new EmailAddress("skhatiwada@test.com","Sujit Tester"),
new EmailAddress("skhatiwada@test.com","Sujit Tester")
};
var subjects = new List { "Test for -name-.", "Test for -name-."};
var plainTextContent = "Hello -name-. We are ready to use -Sample-.";
var htmlContent = "Hello -name-. We are ready to use -Sample-.";
var substitutions = new List<Dictionary<string, string>>
{
new Dictionary<string, string>() {{"-name-", "Sujit Tester"},{"-Sample-","If you are Tester then,
this test is working fine." } },
new Dictionary<string, string>() {{"-name-", "Sujit Developer"}, { "-Sample-", "If you are
Developer then, this test is working fine." } }
};
SendGridMessage sendGridMessage = MailHelper.CreateMultipleEmailsToMultipleRecipients(
fromMail,
emails,
subjects,
plainTextContent,
htmlContent,
substitutions);
SendBulkEmail(sendGridMessage);

Steps to Reproduce

The problem here is that, i am not able to get both the mails under a single recipient in my outlook mail. At times i get the first substituted mail and other times i get the second substituted mail. I tried this and some cases it sent both mails with different mail contents as well, but this is not trustworthy.

Technical details:

• sendgrid-csharp : [v3/Send ]
• Platform (ASP.NET)
• .NET Version: 4.5

[Niladri24dutta]

What is the usage of SendBulkEmail(sendGridMessage); here ? it is a custom method?as per the V3 documentation we need to use var client = new SendGridClient(apiKey); and to send the email like below var response = await client.SendEmailAsync(msg); .
Take a look at this link
Use case for sending email

[thinkingserious]

Thanks for jumping in and trying to help @Niladri24dutta!

@SRossi77,

Have you reviewed our templating use case? It's very similar to what you are trying to do.

Also, duplicate emails are not allowed. That may a source of error also.

With Best Regards,

Elmer