单击“发送”按钮后，我需要一次向 60 到 100 名学生发送邮件。如果我有 6 到 7 个学生，它工作得很好，但是当我开始发送给 60 个学生时，我的代码显示以下错误
系统存储空间不足。服务器响应是:每个连接的电子邮件过多。
这是我的代码
protected void btnsend_Click(object sender, EventArgs e) {
if (drptopics.SelectedValue == "-1")
{
Response.Write(@"<script language='javascript'>alert('Please select one Topic');</script>");
}
else
{
SqlConnection conn = new SqlConnection();
conn.ConnectionString = "Data Source=xxxx; User Id=sa; Password=xxxx; Initial Catalog=xxxx; Integrated Security=SSPI;";
conn.Open();
SqlCommand cmd = new SqlCommand();
cmd.Connection = conn;
cmd.CommandText = "select EMail_1 from Student_Info where Branch_Code='ap' and Student_ID in(select Student_ID from Admissions where Branch_Code='ap' and Batch_ID='" + txtbatchid.Text + "')";
cmd.CommandType = CommandType.Text;
SqlDataAdapter da = new SqlDataAdapter(cmd);
da.SelectCommand = cmd;
DataSet ds = new DataSet();
da.Fill(ds);
if (ds.Tables[0].Rows[0][0] != null)
{
int count = ds.Tables[0].Rows.Count;
for (int i = 0; i < count; i++)
{
MailMessage mm = new MailMessage();
mm.To.Add(new MailAddress(ds.Tables[0].Rows[i][0].ToString()));
mm.From = new MailAddress("xxxxx@abc.com");
mm.Subject = "SMS and Interview Questions of Oracle 11g DBA";
mm.IsBodyHtml = true;
//Day 1 Architecture 1
if (drptopics.SelectedValue == "1")
{
Attachment attachment1 = new Attachment(Server.MapPath("~/Oracle 11g DBA/Day 1/Architecture-1-I.doc")); //create the attachment
mm.Attachments.Add(attachment1);
Attachment attachment2 = new Attachment(Server.MapPath("~/Oracle 11g DBA/Day 1/Architecture1-S.doc")); //create the attachment
mm.Attachments.Add(attachment2);
}
//Day 2 Architecture 2
else if (drptopics.SelectedValue == "2")
{
Attachment attachment1 = new Attachment(Server.MapPath("~/Oracle 11g DBA/Day 2/Architecture-2-I.doc")); //create the attachment
mm.Attachments.Add(attachment1);
Attachment attachment2 = new Attachment(Server.MapPath("~/Oracle 11g DBA/Day 2/Architecture2-S.doc")); //create the attachment
mm.Attachments.Add(attachment2);
}
mm.Body = "<html><head><body><h1>Thank you for choosing Wilshire</h1><br><b>Team Wilshire<b></body></head></html>";
SmtpClient s = new SmtpClient("smtp.net4india.com");
s.Send(mm);
}
}
请告诉我解决方案......................................
最佳答案
SmtpClient.SendAsync() 可能会导致其他问题(SMTP 服务器设置每分钟最大邮件数以避免垃圾邮件)!
由于邮件是相同的，解决方案是一封邮件，所有收件人都是隐藏收件人(Bcc)!
MailMessage mm = new MailMessage();
for (int i = 0; i < count; i++)
{
mm.Bcc.Add(new MailAddress(ds.Tables[0].Rows[i][0].ToString()));
}
mm.To.Add(new MailAddress("xxxxx@abc.com");
mm.From = new MailAddress("xxxxx@abc.com");
mm.Subject = "SMS and Interview Questions of Oracle 11g DBA";
....
SmtpClient s = new SmtpClient("smtp.net4india.com");
s.Send(mm);
关于asp.net - 无法使用 Asp.Net 通过 SMTP 发送邮件，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/17854590/