C# 通过smtp服务器进行邮件发送 MailHelper

C# 通过smtp服务器进行邮件发送 MailHelper.cs

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Net;
using System.IO;
using System.Text;
using System.Net.Mail;

/// <summary>
/// MailHelper 的摘要说明
/// </summary>
public class MailHelper
{
    public MailHelper()
    {
    }

    public string addres_mail = Common.GetConfig("mail", "MailConfig.xml");
    public string addres_smtp = Common.GetConfig("smtp", "MailConfig.xml");
    public string addres_mailpwd = Common.GetConfig("mailpwd", "MailConfig.xml");

    //发送邮件
    public static bool SendEmail(string userEmail, string subject, string content)
    {
        SendSms sms = new SendSms();
        bool bfg = false;
        try
        {
            WriteLog("C://Log//SMTP//", "发信邮箱：" + sms.addres_mail + " 发信密码：" + sms.addres_mailpwd + " 发信smtp：" + sms.addres_smtp + " Email：" + userEmail + "\r\n");
            MailMessage msg = new MailMessage();
            msg.IsBodyHtml = true;
            msg.From = new MailAddress(sms.addres_mail, "越界门户网站-密码找回", Encoding.GetEncoding("utf-8"));
            msg.To.Add(userEmail);
            msg.BodyEncoding = Encoding.GetEncoding("utf-8");
            msg.SubjectEncoding = Encoding.GetEncoding("utf-8");
            msg.Subject = subject;
            msg.Body = content;
            //// 添加附件
            string sfile = "附件地址";
            mail.Attachments.Add(new Attachment(sfile));

            SmtpClient mail = new SmtpClient();//实例   
            mail.Host = sms.addres_smtp;     //发信主机   
            mail.Port = 25;
            mail.UseDefaultCredentials = true;
            mail.Credentials = new NetworkCredential(sms.addres_mail, sms.addres_mailpwd);
            mail.Send(msg);
            bfg = true;
        }
        catch (Exception ex)
        {
            WriteLog("C://Log//Error//", "错误信息 Message：" + ex.Message + "  Source：" + ex.Source + " StackTrace：" + ex.StackTrace + "\r\n");
        }

        return bfg;
    }


    /// <summary>
    /// 写日志
    /// </summary>
    public static void WriteLog(string LogPath, string msg)
    {

        try
        {
            string toFileFoder = LogPath;
            string toFileFullPath = LogPath + " " +
                DateTime.Now.ToString("yyyyMMdd") + ".Log";
            DirectoryInfo di = new DirectoryInfo(toFileFoder);
            if (!di.Exists)
            {
                di.Create();
            }
            System.IO.StreamWriter sw = System.IO.File.AppendText(toFileFullPath);
            sw.WriteLine(msg);
            sw.Close();
        }
        catch
        { }
    }
}