将收件人 email 地址添加到 email 正文

Question

I'm using C# code with basic System.Net.Mail. SmtpClient to send email to recipients.

In the email's body, I need to add the email address for each recipient, Is there is a way to do so in one email to multiple recipients?

//basic settings    
MailMessage mail = new MailMessage();
SmtpClient client = new SmtpClient();
client.Port = 25;
client.DeliveryMethod = SmtpDeliveryMethod.Network;
client.UseDefaultCredentials = false;
client.Host = "smtp.gmail.com";
mail.Subject = "this is a test email.";

//relevent part
msgClient.To.Add(user1@hotmail.com);
msgClient.To.Add(user2@hotmail.com);
msgClient.To.Add(user3@hotmail.com);
mail.Body = "I need to put here the customer's Email Address without sending multiple emails";

client.Send(mail);

Answer 1

this is not possible due to SMTP protocol limitations if you want to do this, you probably should send your emails one by one. nonetheless, it is best if you change the format of your emails so you don't need to include such data in the message body.

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ps: System.Net.Mail.SmtpClien is deprecated use mailkit instead, the APIs are the same, so you don't need to change your code, you just need to install it via NuGet and then change the reference from System.Net.Mail.SmtpClien to MailKit.Net.Smtp.SmtpClient