使用 MailMessage 向多个收件人发送电子邮件？

Question

我在 SQL Server 中存储了多个电子邮件收件人。当我在网页中单击“发送”时，它应该向所有收件人发送电子邮件。我使用

;

分隔了电子邮件。

以下是有效的单一收件人代码：

MailMessage Msg = new MailMessage();
MailAddress fromMail = new MailAddress(fromEmail);
Msg.From = fromMail;
Msg.To.Add(new MailAddress(toEmail));

if (ccEmail != "" && bccEmail != "")
{
    Msg.CC.Add(new MailAddress(ccEmail));
    Msg.Bcc.Add(new MailAddress(bccEmail));
}

SmtpClient a = new SmtpClient("smtp server name");
a.Send(Msg);
sreader.Dispose();

Answer 1

简单！

只需将传入地址列表拆分在“;”上即可字符，并将它们添加到邮件消息中：

foreach (var address in addresses.Split(new [] {";"}, StringSplitOptions.RemoveEmptyEntries))
{
    mailMessage.To.Add(address);    
}

在此示例中，

addresses

包含“

[email protected];[email protected]

”。

Answer 2

根据 Adam Miller 在评论中的建议，我将添加另一个解决方案。

MailMessage(String from, String to) 构造函数接受逗号分隔的地址列表。因此，如果您碰巧已经有一个逗号（'，'）分隔的列表，那么用法就很简单：

MailMessage Msg = new MailMessage(fromMail, addresses);

在这种特殊情况下，我们可以替换“;” for ',' 并且仍然使用构造函数。

MailMessage Msg = new MailMessage(fromMail, addresses.replace(";", ","));

您是否喜欢这个答案或接受的答案取决于您。可以说，循环使意图更清晰，但它更短且不晦涩。但是如果您已经有一个逗号分隔的列表，我认为这是正确的方法。

Answer 3

根据文档：

MailMessage.To 属性 - 返回包含此电子邮件的收件人列表的 MailAddressCollection

这里

MailAddressCollection 有一个名为 的内置方法

   public void Add(string addresses)

   1. Summary:
          Add a list of email addresses to the collection.

   2. Parameters:
          addresses: 
                *The email addresses to add to the System.Net.Mail.MailAddressCollection. Multiple
                *email addresses must be separated with a comma character (",").     

因此，如果有多个收件人，则要求：

传递包含以逗号分隔的电子邮件地址的字符串

您的情况：

只需替换所有 ;与 ,

Msg.To.Add(toEmail.replace(";", ",")); 供参考：

1. https://learn.microsoft.com/en-us/dotnet/api/system.net.mail.mailmessage?view=netframework-4.8
2. https://www.geeksforgeeks.org/c-sharp-replace-method/

Answer 4

这对我来说是有效的：

            var addresses = "[email protected];[email protected]";
            var fromAddress = new MailAddress("[email protected]", "Sender");
            const string fromPassword = "Password";
            string subject = "[Message] Message Subject" ;
            string body = "Message Body";

            var smtp = new SmtpClient
            {
                Host = "smtp.email.com", 
                Port = 587, //or 25 depending on your smtp server config
                EnableSsl = true,
                DeliveryMethod = SmtpDeliveryMethod.Network,
                UseDefaultCredentials = false,
                Credentials = new NetworkCredential(fromAddress.Address, fromPassword)
            };
            foreach (var address in addresses.Split(new[] { ";" }, StringSplitOptions.RemoveEmptyEntries))
            {
            using (var message = new MailMessage(fromAddress.ToString(), address)
            {
                Subject = subject,
                Body = body,
                Priority = MailPriority.High
                
            })
                {
                
                    smtp.Send(message);
                }
            }

Answer 5

您可以使用 LINQ：

string toEmail = "[email protected];[email protected]";
toEmail.Split(";").ToList().ForEach(address => Msg.To.Add(new MailAddress(address)));

Answer 6

我已经使用以下 powershell 脚本并在地址之间使用 (,) 对此进行了测试。这对我有用！

$EmailFrom = "<[email protected]>";
$EmailPassword = "<password>";
$EmailTo = "<[email protected]>,<[email protected]>";
$SMTPServer = "<smtp.server.com>";
$SMTPPort = <port>;
$SMTPClient = New-Object Net.Mail.SmtpClient($SmtpServer,$SMTPPort);
$SMTPClient.EnableSsl = $true;
$SMTPClient.Credentials = New-Object System.Net.NetworkCredential($EmailFrom, $EmailPassword);
$Subject = "Notification from XYZ";
$Body = "this is a notification from XYZ Notifications..";
$SMTPClient.Send($EmailFrom, $EmailTo, $Subject, $Body);