SmtpClient，MailMessage 发送邮件或许是大小限制问题

herohua0509 2011-08-18 09:11:23

void SendMail()
{
SmtpClient _smtpClient = new SmtpClient();
_smtpClient.DeliveryMethod = SmtpDeliveryMethod.Network;//指定电子邮件发送方式
_smtpClient.Host = GetMailNet(m_Address);//指定SMTP服务器
_smtpClient.Credentials = CredentialCache.DefaultNetworkCredentials;

_smtpClient.Credentials = new System.Net.NetworkCredential(m_Address, m_Pwd);//用户名和密码

MailMessage _mailMessage = null;
try
{
_mailMessage = new MailMessage(m_Address, t_Address);//发件人，收件人
}
catch
{
MessageBox.Show("Sender or recipient address is not correct！");
return;
}

_mailMessage.Subject = mailTitle;//主题
_mailMessage.Body = mailContent;//内容
_mailMessage.BodyEncoding = System.Text.Encoding.UTF8;//正文编码
_mailMessage.IsBodyHtml = true;//设置为HTML格式
_mailMessage.Priority = MailPriority.High;//优先级

Attachment attachment = null;
if (fileInfo != null)
{
//Stream fileReader = new FileStream(fileInfo.FullName, FileMode.Open);

//attachment = new Attachment(fileReader, fileInfo.Name);

attachment = new Attachment(fileInfo.FullName, MediaTypeNames.Application.Octet);
// Add time stamp information for the file.
ContentDisposition disposition = attachment.ContentDisposition;
disposition.CreationDate = System.IO.File.GetCreationTime(fileInfo.FullName);
disposition.ModificationDate = System.IO.File.GetLastWriteTime(fileInfo.FullName);
disposition.ReadDate = System.IO.File.GetLastAccessTime(fileInfo.FullName);

_mailMessage.Attachments.Add(attachment);

}
try
{
dis.BeginInvoke(new StopAngle(HideBorder), System.Windows.Threading.DispatcherPriority.Normal);
//border.Visibility = System.Windows.Visibility.Hidden;
_smtpClient.Send(_mailMessage);
fileInfo = null;
attachment.Dispose();

}
catch
{
MessageBox.Show("Send failed!");
attachment.Dispose();
}
}

抛出错误，发送邮件失败，

索引超出界限

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