Email工具类

/// <summary>
    /// Email工具类
    /// </summary>
    public class MailUtils
    {
        #region Fields
        private string _userName;
        private string _userPassword;
        private string _host;
        private int _port;
        private SmtpClient smtp = null;
        #endregion

        #region Constructors
        /// <summary>
        /// 构造函数
        /// </summary>
        /// <param name="host">服务器地址（IP或域名）</param>
        /// <param name="userName">认证用户名</param>
        /// <param name="userPassword">认证密码</param>
        public MailUtils(string host, string userName, string userPassword)
        {
            smtp = new SmtpClient(host);
            Initialize(userName, userPassword);
        }

        /// <summary>
        /// 构造函数
        /// </summary>
        /// <param name="host">服务器地址（IP或域名）</param>
        /// <param name="port">服务侦听端口</param>
        /// <param name="userName">认证用户名</param>
        /// <param name="userPassword">认证密码</param>
        public MailUtils(string host, int port, string userName, string userPassword)
        {
            smtp = new SmtpClient(host, port);
            Initialize(userName, userPassword);
        }
        #endregion

        #region Properties
        /// <summary>
        /// 认证用户名
        /// </summary>
        public string UserName
        {
            get { return _userName; }
            set { _userName = value; }
        }

        /// <summary>
        /// 认证密码
        /// </summary>
        public string UserPassword
        {
            get { return _userPassword; }
            set { _userPassword = value; }
        }

        /// <summary>
        /// 服务器地址（IP或域名）
        /// </summary>
        public string Host
        {
            get { return _host; }
            set { _host = value; }
        }

        /// <summary>
        /// 服务侦听端口
        /// </summary>
        public int Port
        {
            get { return _port; }
            set { _port = value; }
        }
        #endregion

        #region Instance Methods
        /// <summary>
        /// 初始化SMTP对象
        /// </summary>
        /// <param name="userName">认证用户名</param>
        /// <param name="userPassword">认证密码</param>
        public void Initialize(string userName, string userPassword)
        {
            smtp.UseDefaultCredentials = false;
            smtp.Credentials = new System.Net.NetworkCredential(userName, userPassword);
            smtp.DeliveryMethod = SmtpDeliveryMethod.Network;
            UserName = userName;
            UserPassword = userPassword;
        }

        /// <summary>
        /// 发送邮件
        /// </summary>
        /// <param name="strReceiver">收件人地址</param>
        /// <param name="strTitle">邮件标题</param>
        /// <param name="strContent">邮件内容</param>
        /// <returns></returns>
        public bool Send(string strReceiver, string strTitle, string strContent)
        {
            return Send(strReceiver, strTitle, strContent, null);
        }

        /// <summary>
        /// 发送邮件（可带附件）
        /// </summary>
        /// <param name="strReceiver">收件人地址</param>
        /// <param name="strSubject">邮件主题</param>
        /// <param name="strContent">邮件内容</param>
        /// <param name="strAttachmentPath">附件的物理地址</param>
        /// <returns></returns>
        public bool Send(string strReceiver, string strSubject, string strContent, string strAttachmentPath)
        {
            try
            {
                MailMessage message = new MailMessage(UserName, strReceiver, strSubject, strContent);
                message.BodyEncoding = System.Text.Encoding.UTF8;
                if (strAttachmentPath != null && File.Exists(strAttachmentPath))
                {
                    message.Attachments.Add(new Attachment(strAttachmentPath));
                }
                message.IsBodyHtml = true;
                smtp.Send(message);
                return true;
            }
            catch
            {
                return false;
            }
        }
        #endregion

        #region Static Methods
        /// <summary>
        /// 发送邮件
        /// </summary>
        /// <param name="server">stmp服务器地址</param>
        /// <param name="user">用户名,包括@和域名的，这个要注意</param>
        /// <param name="pwd">密码</param>
        /// <param name="receiver">收件人地址</param>
        /// <param name="title">邮件标题</param>
        /// <param name="content">邮件内容</param>
        /// <returns></returns>
        public static bool Send(string server, string user, string pwd, string receiver, string title, string content)
        {
            return Send(server, user, pwd, receiver, title, content, null);
        }

        /// <summary>
        /// 发送邮件
        /// </summary>
        /// <param name="server">stmp服务器地址</param>
        /// <param name="user">用户名,包括@和域名的，这个要注意</param>
        /// <param name="pwd">密码</param>
        /// <param name="receiver">收件人地址</param>
        /// <param name="title">邮件标题</param>
        /// <param name="content">邮件内容</param>
        /// <param name="attachmentPath">附件的绝对路径</param>
        ///  <returns></returns>
        public static bool Send(string server, string user, string pwd, string receiver, string title, string content, string attachmentPath)
        {
            try
            {
                SmtpClient smtp = new SmtpClient(server);
                smtp.UseDefaultCredentials = false;
                smtp.Credentials = new System.Net.NetworkCredential(user, pwd);
                smtp.DeliveryMethod = SmtpDeliveryMethod.Network;
                MailMessage message = new MailMessage(user, receiver, title, content);
                message.BodyEncoding = System.Text.Encoding.UTF8;
                if (attachmentPath != null && System.IO.File.Exists(attachmentPath))
                {
                    message.Attachments.Add(new Attachment(attachmentPath));
                }
                message.IsBodyHtml = true;
                smtp.Send(message);
                return true;

            }
            catch
            {
                return false;
            }         
        }
        #endregion
    }