如何在 Gmail 电子邮件中包含多个收件人？

Question

我有这个工作代码可以使用我的 gmail 帐户发送电子邮件：

public static void SendEmail(string fullName, string toEmail, string HH, string HHEmailAddr)
{
    var fromAddress = new MailAddress(FROM_EMAIL, FROM_EMAIL_NAME);
    var toAddress = new MailAddress(toEmail, fullName);
    var toAddressHH = new MailAddress(HHEmailAddr, HH);
    string fromPassword = GMAIL_PASSWORD;

    List<String> htmlBody = new List<string>
    {
        "<html><body>",
        . . .
        "</body></html>"
    };
    var body = string.Join("", htmlBody.ToArray());

    var smtp = new SmtpClient
    {
        Host = "smtp.gmail.com",
        Port = 587,
        EnableSsl = true,
        DeliveryMethod = SmtpDeliveryMethod.Network,
        UseDefaultCredentials = false,
        Credentials = new NetworkCredential(fromAddress.Address, fromPassword)
    };
    using (var message = new MailMessage(fromAddress, toAddress)
    {
        Subject = subject,
        Body = body,
        IsBodyHtml = true
    })
    {
        smtp.Send(message);
    }
}

问题是我想将电子邮件发送给两个收件人，而不是一个。理论上我可以像这样在该代码的末尾添加另一条消息：

    . . .
    using (var messageHH = new MailMessage(fromAddress, toAddressHH)
    {
        Subject = subject,
        Body = body,
        IsBodyHtml = true
    })
    {
        smtp.Send(messageHH);
    }
}

...从一个代码块发送两封电子邮件，但我真正想做的是这样的：

List<MailAddress> recipients = new List<MailAddress>();
recipients.Add(toAddress);
recipients.Add(toAddressHH);
. . .
using (var message = new MailMessage(fromAddress, recipients)

...但是 MailMessage 的构造函数似乎没有这样的重载。如何将第二个收件人添加到从 gmail 发送的电子邮件中？作为共同收件人和 "CC" 收件人都很高兴知道。

更新

如果我确实尝试了建议：

using (var message = new MailMessage(fromAddress, toAddress)
{
    Subject = subject,
    Body = body,
    To.Add("dplatypus@att.net", "Duckbilled Platypus")
})

...我得到：

无效的初始值设定项成员声明符

..和：

名称'To'在当前上下文中不存在

我通过以下排列得到相同结果：

To.Add(new MailAddress("dplatypus@att.net", "Duckbilled Platypus"))

Answer 1

查看 Microsoft's Documentation，您可以看到 MailMessage.To 属性是一个 MailAddressCollection。

MailAddressCollection 有一个 Add() 方法，可以将值附加到集合中。

根据这些信息，您可以尝试这样的操作：

messageHH.To.Add(new MailAddress("recipient1@domain.com","Recipient1 Name"));
messageHH.To.Add(new MailAddress("recipient2@domain.com","Recipient2 Name"));
messageHH.To.Add(new MailAddress("recipient3@domain.com","Recipient3 Name"));
//etc...

Answer 2

我不得不更改声明的 "style"，但这有效：

var message = new MailMessage(fromAddress, toAddress);
message.Subject = subject;
message.Body = body;
message.To.Add(new MailAddress("dplatypus@att.net", "Duckbilled Platypus"));
message.To.Add(new MailAddress("duckbill@att.net", "Platypus 2"));
smtp.Send(message);

如何在 Gmail 电子邮件中包含多个收件人？

How can I include multiple recipients in a gmail email message?

c#

email

smtp

mailmessage

更新