发邮件

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

/// <summary>
/// 发邮件

/// </summary>
/// <param name="subject">邮件主题</param>
/// <param name="body">邮件内容</param>
/// <param name="mailto">收件人地址（用;间隔）</param>
public static bool SendMail(string subject, string body, string mailto)
{
            //创建一个MailMessage对象
            MailMessage message = new MailMessage();

            //赋给MailMessage对象属性
            string[] mails = mailto.Split(';');
            foreach (string mail in mails)
            {
                message.To.Add(new MailAddress(mail));
            }
            message.Subject = string.Format(subject);
            message.Body = body;
            message.BodyEncoding = Encoding.UTF8;
            message.IsBodyHtml = true;
            message.Priority = MailPriority.High;

            //创建一个SmtpClient类实例
            SmtpClient smtp = new SmtpClient();
            try
            {
                smtp.Send(message);
                return true;
            }
            catch
            {
                return false;
            }
}