C#发送邮件（附件）类

using System;
using System.Collections.Generic;
using System.Configuration;
using System.Linq;
using System.Web;
using System.Reflection;
using System.Net;
using System.Net.Mail;
using System.Security.Cryptography.X509Certificates;
using System.Net.Security;
using System.Net.Mime;

/// <summary>
/// 发送内邮(收件人、抄送人、附件若有多个，用分号[;]隔开)
/// </summary>
/// <param name="toMail">收件人</param>
/// <param name="ccMail">抄送人</param>
/// <param name="subject">邮件主题</param>
/// <param name="content">邮件内容</param>
/// <param name="filepath">附件路径</param>
public static bool SendMail(string toMail, string ccMail, string subject, string content, string filepath)
{
try
{
var emailAcount = ConfigurationManager.AppSettings["EmailAcount"];
var emailPassword = ConfigurationManager.AppSettings["EmailPassword"];
var emailServer = ConfigurationManager.AppSettings["SMTPServer"];
var emailServerPort = ConfigurationManager.AppSettings["SMTPServerPort"];
MailMessage message = new MailMessage();
//设置发件人,163邮箱为例,需要在Web.config中进行配置
MailAddress fromAddr = new MailAddress(string.Format("{0}@163.com", emailAcount));
message.From = fromAddr;

//遍历收件人邮箱地址
if (toMail.Trim().Length != 0)
{
string[] receivers = toMail.Trim().Split(';');
for (int i = 0; i < receivers.Length; i++)
{
if (receivers[i].Length > 0)
{
message.To.Add(receivers[i]);//为该邮件添加联系人
}
}
}
//遍历抄送人邮箱地址
if (ccMail.Trim().Length != 0)
{
string[] ccreceivers = ccMail.Trim().Split(';');
for (int j = 0; j < ccreceivers.Length; j++)
{
if (ccreceivers[j].Length > 0)
{
message.CC.Add(ccreceivers[j]);//为该邮件添加抄送人
}
}
}
//设置邮件标题
message.Subject = subject;
//设置邮件内容
message.Body = content;

//添加附件
if(filepath.Trim().Length != 0)
{
string[] attachFiles = filepath.Trim().Split(';');
for(int k = 0; k < attachFiles.Length; k++)
{
if (attachFiles[k].Length > 0)
{
Attachment data = new Attachment(attachFiles[k], MediaTypeNames.Application.Octet);
message.Attachments.Add(data);
}
}
}

//设置邮件SMTP服务器
//SmtpClient client = new SmtpClient("smtp.163.com", 25);
SmtpClient client = new SmtpClient(emailServer, Convert.ToInt32(emailServerPort));
//设置发送人的邮箱账号和密码
client.Credentials = new NetworkCredential(emailAcount, emailPassword);
//启用ssl,也就是安全发送
client.EnableSsl = true;
ServicePointManager.ServerCertificateValidationCallback =
delegate(Object obj, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors) { return true; };
//发送邮件
client.Send(message);
return true;
}
catch (Exception ex)
{
log.Error("SendMail()", ex);
return false;
}
}