.Net使用SmtpClient发送邮件，报错：不允许使用邮箱名称。 服务器响应为: xxxw

从网上找了一个封装.Net的Smtp邮件发送的类

[csharp]
class MailSender 
{ 
    private MailMessage mailMessage; 
    private SmtpClient smtpClient; 
    private string password;//发件人密码   
     
    /// <summary>    
    /// 处审核后类的实例    
    /// </summary>    
    /// <param name="To">收件人地址</param>    
    /// <param name="From">发件人地址</param>    
    /// <param name="Body">邮件正文</param>    
    /// <param name="Title">邮件的主题</param>    
    /// <param name="Password">发件人密码</param>    
    public MailSender(string To, string From, string Body, string Title, string Password) 
    { 
        mailMessage = new MailMessage(); 
        mailMessage.To.Add(To); 
        mailMessage.From = new System.Net.Mail.MailAddress(From); 
        mailMessage.Subject = Title; 
        mailMessage.Body = Body; 
        mailMessage.IsBodyHtml = true; 
        mailMessage.BodyEncoding = System.Text.Encoding.UTF8; 
        mailMessage.Priority = System.Net.Mail.MailPriority.Normal; 
        this.password = Password; 
    } 
    /// <summary>    
    /// 添加附件    
    /// </summary>    
    public void Attachments(string Path)   
    {   
        string[] path = Path.Split(',');   
        Attachment data;   
        ContentDisposition disposition;   
        for (int i = 0; i < path.Length; i++)   
        {   
            data = new Attachment(path[i], MediaTypeNames.Application.Octet);//实例化附件    
            disposition = data.ContentDisposition;   
            disposition.CreationDate = System.IO.File.GetCreationTime(path[i]);//获取附件的创建日期    
            disposition.ModificationDate = System.IO.File.GetLastWriteTime(path[i]);//获取附件的修改日期    
            disposition.ReadDate = System.IO.File.GetLastAccessTime(path[i]);//获取附件的读取日期    
            mailMessage.Attachments.Add(data);//添加到附件中    
        }   
    } 
    /// <summary>    
    /// 异步发送邮件    
    /// </summary>    
    /// <param name="CompletedMethod"></param>    
    public void SendAsync(SendCompletedEventHandler CompletedMethod) 
    { 
        if (mailMessage != null) 
        { 
            smtpClient = new SmtpClient(); 
            smtpClient.Credentials = new System.Net.NetworkCredential(mailMessage.From.Address, password);//设置发件人身份的票据    
            smtpClient.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network; 
            smtpClient.Host = "smtp." + mailMessage.From.Host; 
            smtpClient.SendCompleted += new SendCompletedEventHandler(CompletedMethod);//注册异步发送邮件完成时的事件    
            smtpClient.SendAsync(mailMessage, mailMessage.Body); 
        } 
    } 
    /// <summary>    
    /// 发送邮件    
    /// </summary>    
    public void Send() 
    { 
        if (mailMessage != null) 
        { 
            smtpClient = new SmtpClient(); 
            smtpClient.Credentials = new System.Net.NetworkCredential(mailMessage.From.Address, password);//设置发件人身份的票据    
            smtpClient.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network; 
            smtpClient.Host = "smtp." + mailMessage.From.Host; 
            smtpClient.Send(mailMessage); 
        } 
    }   
} 

class MailSender
{
 private MailMessage mailMessage;
 private SmtpClient smtpClient;
 private string password;//发件人密码
 
 /// <summary> 
 /// 处审核后类的实例 
 /// </summary> 
 /// <param name="To">收件人地址</param> 
 /// <param name="From">发件人地址</param> 
 /// <param name="Body">邮件正文</param> 
 /// <param name="Title">邮件的主题</param> 
 /// <param name="Password">发件人密码</param> 
 public MailSender(string To, string From, string Body, string Title, string Password)
 {
  mailMessage = new MailMessage();
  mailMessage.To.Add(To);
  mailMessage.From = new System.Net.Mail.MailAddress(From);
  mailMessage.Subject = Title;
  mailMessage.Body = Body;
  mailMessage.IsBodyHtml = true;
  mailMessage.BodyEncoding = System.Text.Encoding.UTF8;
  mailMessage.Priority = System.Net.Mail.MailPriority.Normal;
  this.password = Password;
 }
 /// <summary> 
 /// 添加附件 
 /// </summary> 
 public void Attachments(string Path) 
 { 
  string[] path = Path.Split(','); 
  Attachment data; 
  ContentDisposition disposition; 
  for (int i = 0; i < path.Length; i++) 
  { 
   data = new Attachment(path[i], MediaTypeNames.Application.Octet);//实例化附件 
   disposition = data.ContentDisposition; 
   disposition.CreationDate = System.IO.File.GetCreationTime(path[i]);//获取附件的创建日期 
   disposition.ModificationDate = System.IO.File.GetLastWriteTime(path[i]);//获取附件的修改日期 
   disposition.ReadDate = System.IO.File.GetLastAccessTime(path[i]);//获取附件的读取日期 
   mailMessage.Attachments.Add(data);//添加到附件中 
  } 
 }
 /// <summary> 
 /// 异步发送邮件 
 /// </summary> 
 /// <param name="CompletedMethod"></param> 
 public void SendAsync(SendCompletedEventHandler CompletedMethod)
 {
  if (mailMessage != null)
  {
   smtpClient = new SmtpClient();
   smtpClient.Credentials = new System.Net.NetworkCredential(mailMessage.From.Address, password);//设置发件人身份的票据 
   smtpClient.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network;
   smtpClient.Host = "smtp." + mailMessage.From.Host;
   smtpClient.SendCompleted += new SendCompletedEventHandler(CompletedMethod);//注册异步发送邮件完成时的事件 
   smtpClient.SendAsync(mailMessage, mailMessage.Body);
  }
 }
 /// <summary> 
 /// 发送邮件 
 /// </summary> 
 public void Send()
 {
  if (mailMessage != null)
  {
   smtpClient = new SmtpClient();
   smtpClient.Credentials = new System.Net.NetworkCredential(mailMessage.From.Address, password);//设置发件人身份的票据 
   smtpClient.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network;
   smtpClient.Host = "smtp." + mailMessage.From.Host;
   smtpClient.Send(mailMessage);
  }
 } 
}
使用某些邮箱的时候会报错（如sohu）：不允许使用邮箱名称，服务器响应为: xxx。需要设置单独的用户名，故修改了下，并做了一些优化。如下：

 

 

[csharp] 
class MailSender 
{ 
    private readonly MailMessage mail; 
    private readonly string password;//发件人密码   
    private readonly string user; 
 
    /// <summary>    
    /// 处审核后类的实例    
    /// </summary>    
    /// <param name="to">收件人地址</param>    
    /// <param name="from">发件人地址</param>    
    /// <param name="body">邮件正文</param>    
    /// <param name="subject">邮件的主题</param>    
    /// <param name="sendAccount">发件人账号</param>  
    /// <param name="sendPassword">发件人密码</param>    
    public MailSender(string to, string from, string body, string subject, string sendAccount, string sendPassword) 
    { 
        mail = new MailMessage(); 
        mail.To.Add(to); 
        mail.From = new MailAddress(from); 
        mail.Subject = subject; 
        mail.Body = body; 
        mail.IsBodyHtml = true; 
        mail.BodyEncoding = System.Text.Encoding.UTF8; 
        mail.Priority = MailPriority.Normal; 
        this.password = sendPassword; 
        this.user = sendAccount; 
    } 
    /// <summary>    
    /// 添加附件    
    /// </summary>    
    public void Attachments(string path)   
    {   
        string[] pathes = path.Split(',');   
        for (int i = 0; i < pathes.Length; i++)   
        {   
            var data = new Attachment(pathes[i], MediaTypeNames.Application.Octet);//实例化附件    
            var disposition = data.ContentDisposition;   
            disposition.CreationDate = System.IO.File.GetCreationTime(pathes[i]);//获取附件的创建日期    
            disposition.ModificationDate = System.IO.File.GetLastWriteTime(pathes[i]);//获取附件的修改日期    
            disposition.ReadDate = System.IO.File.GetLastAccessTime(pathes[i]);//获取附件的读取日期    
            mail.Attachments.Add(data);//添加到附件中    
        }   
    } 
    /// <summary>    
    /// 异步发送邮件    
    /// </summary>    
    /// <param name="CompletedMethod"></param>    
    public void SendAsync(SendCompletedEventHandler CompletedMethod) 
    { 
        if (mail != null) 
        { 
            var smtpClient = new SmtpClient(); 
            smtpClient.Credentials = new System.Net.NetworkCredential(user, password);//设置发件人身份的票据    
            smtpClient.DeliveryMethod = SmtpDeliveryMethod.Network; 
            smtpClient.Host = "smtp." + mail.From.Host; 
            smtpClient.SendCompleted += CompletedMethod;//注册异步发送邮件完成时的事件    
            smtpClient.SendAsync(mail, mail.Body); 
        } 
    } 
    /// <summary>    
    /// 发送邮件    
    /// </summary>    
    public void Send() 
    { 
        if (mail != null) 
        { 
            var smtpClient = new SmtpClient(); 
            smtpClient.Credentials = new System.Net.NetworkCredential(user, password);//设置发件人身份的票据    
            smtpClient.DeliveryMethod = SmtpDeliveryMethod.Network; 
            smtpClient.Host = "smtp." + mail.From.Host; 
            smtpClient.Send(mail); 
        } 
    }   
} 

    class MailSender
    {
        private readonly MailMessage mail;
        private readonly string password;//发件人密码
        private readonly string user;

        /// <summary> 
        /// 处审核后类的实例 
        /// </summary> 
        /// <param name="to">收件人地址</param> 
        /// <param name="from">发件人地址</param> 
        /// <param name="body">邮件正文</param> 
        /// <param name="subject">邮件的主题</param> 
        /// <param name="sendAccount">发件人账号</param>
        /// <param name="sendPassword">发件人密码</param> 
        public MailSender(string to, string from, string body, string subject, string sendAccount, string sendPassword)
        {
            mail = new MailMessage();
            mail.To.Add(to);
            mail.From = new MailAddress(from);
            mail.Subject = subject;
            mail.Body = body;
            mail.IsBodyHtml = true;
            mail.BodyEncoding = System.Text.Encoding.UTF8;
            mail.Priority = MailPriority.Normal;
            this.password = sendPassword;
            this.user = sendAccount;
        }
        /// <summary> 
        /// 添加附件 
        /// </summary> 
        public void Attachments(string path) 
        { 
            string[] pathes = path.Split(','); 
            for (int i = 0; i < pathes.Length; i++) 
            { 
                var data = new Attachment(pathes[i], MediaTypeNames.Application.Octet);//实例化附件 
                var disposition = data.ContentDisposition; 
                disposition.CreationDate = System.IO.File.GetCreationTime(pathes[i]);//获取附件的创建日期 
                disposition.ModificationDate = System.IO.File.GetLastWriteTime(pathes[i]);//获取附件的修改日期 
                disposition.ReadDate = System.IO.File.GetLastAccessTime(pathes[i]);//获取附件的读取日期 
                mail.Attachments.Add(data);//添加到附件中 
            } 
        }
        /// <summary> 
        /// 异步发送邮件 
        /// </summary> 
        /// <param name="CompletedMethod"></param> 
        public void SendAsync(SendCompletedEventHandler CompletedMethod)
        {
            if (mail != null)
            {
                var smtpClient = new SmtpClient();
                smtpClient.Credentials = new System.Net.NetworkCredential(user, password);//设置发件人身份的票据 
                smtpClient.DeliveryMethod = SmtpDeliveryMethod.Network;
                smtpClient.Host = "smtp." + mail.From.Host;
                smtpClient.SendCompleted += CompletedMethod;//注册异步发送邮件完成时的事件 
                smtpClient.SendAsync(mail, mail.Body);
            }
        }
        /// <summary> 
        /// 发送邮件 
        /// </summary> 
        public void Send()
        {
            if (mail != null)
            {
                var smtpClient = new SmtpClient();
                smtpClient.Credentials = new System.Net.NetworkCredential(user, password);//设置发件人身份的票据 
                smtpClient.DeliveryMethod = SmtpDeliveryMethod.Network;
                smtpClient.Host = "smtp." + mail.From.Host;
                smtpClient.Send(mail);
            }
        } 
    }