此发送邮件的代码对吗？

using System.Net.Mail;//添加邮件提醒
using System.Net;



privatevoid SendMail(string fromMail, string toMail, string subJect, string body, string userName,string passWord, string smtpHost)
        {
            
//设置邮件信息 发件人地址、收件人地址、标题、邮件内容           
            MailMessage mail =new MailMessage(fromMail, toMail, subJect, body);
            mail.ReplyTo =new MailAddress(fromMail);
//设置邮件主题格式
            mail.BodyEncoding = System.Text.Encoding.UTF8;   
//设置邮件主体格式是否为 html 格式
            mail.IsBodyHtml =true;
//邮件优先级别
            mail.Priority = MailPriority.High;  
//设置发送邮箱的smtp服务器或安全端口
            SmtpClient client =new SmtpClient(smtpHost);  
//验证邮件服务器的身份
            NetworkCredential work =new System.Net.NetworkCredential(userName, passWord);
            client.Credentials = work;              
//设置邮件发送格式
            client.DeliveryMethod = SmtpDeliveryMethod.Network; 
//是否请求一起发送
            client.UseDefaultCredentials =true;          
//安全连接设置
            client.EnableSsl =false; //一定要为false 或者去掉这句 ！不然报服务器不支持安全连接 也就是客户端没有开通SSL加密 所以以后都不要管！           
try
            {
                client.Send(mail);
                Response.Write("发送成功");
            }
catch (Exception ex)
            {
                Response.Write(ex.Message +"  请联系管理员。");
            }        
        }




调用代码：SendMail("frank@163.com", "1262510777@qq.com", "标题", "邮件内容", "frank", "qin10191789808", "smtp.163.com");