C# 实现邮件发送功能

/// <summary>
        /// 发送邮件
        /// </summary>
        /// <param name="from">发件人邮箱</param>
        /// <param name="fromname">发件人姓名</param>
        /// <param name="to">收件人地址</param>
        /// <param name="subject">标题</param>
        /// <param name="body">内容</param>
        /// <param name="username">发件人账号</param>
        /// <param name="password">发件人密码</param>
        /// <param name="server">发件服务器</param>
        /// <param name="port">端口</param>
        /// <returns></returns>
        public static bool SendMail(string from, string fromname, string to, string subject, string body, string username, string password, string server,int port=25)
        {

            try
            {
                //邮件发送类 
                MailMessage mail = new MailMessage();
                //是谁发送的邮件 
                mail.From = new MailAddress(from, fromname);
                //发送给谁 
                mail.To.Add(to);
                //标题 
                mail.Subject = subject;
                //内容编码 
                mail.BodyEncoding = Encoding.Default;
                //发送优先级 
                mail.Priority = MailPriority.High;
                //邮件内容 
                mail.Body = body;
                //是否HTML形式发送 
                mail.IsBodyHtml = true;
                //邮件服务器和端口 
                SmtpClient smtp = new SmtpClient(server, port);
                smtp.UseDefaultCredentials = true;
                //指定发送方式 
                smtp.DeliveryMethod = SmtpDeliveryMethod.Network;
                //指定登录名和密码 
                smtp.Credentials = new System.Net.NetworkCredential(username, password);
                //超时时间 
                smtp.Timeout = 10000;
                smtp.Send(mail);
                return true;
            }

            catch (Exception exp)
            {
                //return exp.Message;
                return false;
            }
        }