从列表框c#发送多封电子邮件

MailMessage mail = new MailMessage();
mail.From = new MailAddress("sender@example.com");
foreach (var recipient in selectedRecipients)
{
    mail.To.Add(new MailAddress(recipient));
}
mail.Subject = "邮件主题";
mail.Body = "邮件正文";
mail.IsBodyHtml = true; // 如果需要发送HTML格式的邮件正文

Attachment attachment = new Attachment("文件路径");
mail.Attachments.Add(attachment);

SmtpClient smtpClient = new SmtpClient();
smtpClient.Host = "smtp.example.com";
smtpClient.Port = 587;
smtpClient.EnableSsl = true; // 如果需要使用SSL加密连接
smtpClient.Credentials = new NetworkCredential("username", "password");

smtpClient.Send(mail);

using System.Net.Mail;
using System.Net;

// 获取选中的收件人列表
List<string> selectedRecipients = new List<string>();
foreach (var item in listBox.SelectedItems)
{
    selectedRecipients.Add(item.ToString());
}

// 创建电子邮件对象
MailMessage mail = new MailMessage();
mail.From = new MailAddress("sender@example.com");
foreach (var recipient in selectedRecipients)
{
    mail.To.Add(new MailAddress(recipient));
}
mail.Subject = "邮件主题";
mail.Body = "邮件正文";
mail.IsBodyHtml = true;

// 添加附件（可选）
Attachment attachment = new Attachment("文件路径");
mail.Attachments.Add(attachment);

// 配置SMTP服务器
SmtpClient smtpClient = new SmtpClient();
smtpClient.Host = "smtp.example.com";
smtpClient.Port = 587;
smtpClient.EnableSsl = true;
smtpClient.Credentials = new NetworkCredential("username", "password");

// 发送邮件
smtpClient.Send(mail);