How to send Email to multiple Recipients with MailMessage?

问题

I have multiple email recipients stored in Sql Server. When I click send in the webpage it should send email to all recipients.I have separated emails using ';'.

Following is the single recipient code.

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();

回答1:

Easy!

Just split the incoming address list on the ";" character, and add them to the mail message:

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

In this example, addresses contains "address1@example.com;address2@example.com".

回答2:

As suggested by Adam Miller in the comments, I'll add another solution.

The MailMessage(String from, String to) constructor accepts a comma separated list of addresses. So if you happen to have already a comma (',') separated list, the usage is as simple as:

MailMessage Msg = new MailMessage(fromMail, addresses);

In this particular case, we can replace the ';' for ',' and still make use of the constructor.

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

Whether you prefer this or the accepted answer it's up to you. Arguably the loop makes the intent clearer, but this is shorter and not obscure. But should you already have a comma separated list, I think this is the way to go.

回答3:

I've tested this using the following powershell script and using (,) between the addresses. It worked for me!

$EmailFrom = "<from@any.com>";
$EmailPassword = "<password>";
$EmailTo = "<to1@any.com>,<to2@any.com>";
$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);

来源：https://stackoverflow.com/questions/23484503/how-to-send-email-to-multiple-recipients-with-mailmessage

标签

mailmessage