【发布时间】：2013-05-28 10:27:07
【问题描述】：
我有问题。我编写了一个程序，可让您从 .txt 列表中向该地址发送电子邮件。它有效（我在德国），但对于其他人（在其他国家）它不起作用。对他们来说，只有通过 Gmail 发送电子邮件才有效。有什么帮助吗？
代码如下：
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void cmdDistribute_Click(object sender, EventArgs e)
{
FileStream fs;
StreamReader sr;
if (Receiverlist.Text == "")
{
MessageBox.Show("Please type in the path of the list with the receiver! (.txt)", "ERROR : CANT FIND RECEIVERLIST!", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
fs = new FileStream(Receiverlist.Text, FileMode.Open);
sr = new StreamReader(fs);
string zeile;
if (senderID.Text == "")
{
MessageBox.Show("Please type in your login information!", "ERROR : NO EMAIL ADDRESS!");
fs.Close();
return;
}
else if (SenderPassword.Text == "")
{
MessageBox.Show("Please type in your login information!", "ERROR : NO PASSWORD!");
fs.Close();
return;
}
MessageBox.Show("While sending the emails this programm won´t response till it has send \nall emails! This could take a while, so please be patient...", "ALERT", MessageBoxButtons.OK, MessageBoxIcon.Warning);
string mailProvider = "";
int port = 0;
try
{
if (ProviderGmail.Checked)
{
mailProvider = "smtp.gmail.com";
port = 587;
}
else if (providerHotmail.Checked)
{
mailProvider = "smtp.live.com";
port = 587;
}
}
catch (Exception ex)
{
MessageBox.Show("Can´t connect to the GMail / Hotmail server. \n Please contact TheFlash on skype!", "ERROR : SMTPSERVER", MessageBoxButtons.OK, MessageBoxIcon.Error);
fs.Close();
return;
}
if (EmailSubject.Text == "")
{
MessageBox.Show("Please type in the subject of the email!.", "ERROR : EMPTY SUBJECT", MessageBoxButtons.OK, MessageBoxIcon.Error);
fs.Close();
return;
}
int n = 1;
while (sr.Peek() != -1)
{
zeile = sr.ReadLine();
try
{
System.Net.Mail.MailAddress DistributorMail = new System.Net.Mail.MailAddress(senderID.Text);
System.Net.Mail.MailAddress Receiver = new System.Net.Mail.MailAddress(zeile);
System.Net.Mail.MailMessage email = new System.Net.Mail.MailMessage(DistributorMail, Receiver);
email.Subject = EmailSubject.Text;
email.Body = EmailBody.Text;
System.Net.Mail.SmtpClient client = new System.Net.Mail.SmtpClient(mailProvider,port);
client.EnableSsl = true;
client.UseDefaultCredentials = false;
client.Credentials = new System.Net.NetworkCredential(senderID.Text, SenderPassword.Text);
if (checkBox1.Checked)
{
if (EmailAttachment.Text == "")
{
MessageBox.Show("Please type in the path of your attachment!.", "ERROR : EMPTY ATTACHMENT PATH", MessageBoxButtons.OK, MessageBoxIcon.Error);
fs.Close();
return;
}
else
{
MessageBox.Show("If you add an attachment to your mail, it will take longer to send it!", "WARNING", MessageBoxButtons.OK, MessageBoxIcon.Warning);
email.Attachments.Add(new System.Net.Mail.Attachment(EmailAttachment.Text));
}
}
else
{
EmailAttachment.Enabled = false;
}
try
{
client.Send(email);
label9.Text = "Emails sent : " + n;
n = n + 1;
if (sr.Peek() == -1)
MessageBox.Show("Finished!", "TheFlash´s Email Distributor", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
}
catch (Exception Ex)
{
label9.Text = "Couldn´t send the emails!";
fs.Close();
return;
}
}
catch (Exception ex)
{
MessageBox.Show("This is not an valid email address.", "ERROR : WRONG EMAIL FORMAT", MessageBoxButtons.OK, MessageBoxIcon.Error);
fs.Close();
return;
}
}
fs.Close();
return;
}
private void cmdExit_Click(object sender, EventArgs e)
{
Close();
}
private void cmdAbout_Click(object sender, EventArgs e)
{
new AboutBox1().Show();
}
}
【问题讨论】：
-
您是使用 TLS 连接还是仅使用基本 SSL？
-
请阅读this answer 了解我编辑您的标题的原因。
-
@MikePrecup 与基本 SSL 连接，它在代码手册中......
-
我去做了一些研究，你实际上正在使用 TLS：msdn.microsoft.com/en-us/library/…，这很好，因为我相信 hotmail 需要它。有两种使用 SSL 的方法，你所有的代码都有一个 EnableSsl 的标志，所以我问了。不需要像我没有阅读问题一样对待我。
-
@iAmFastAndYou 在发送的 try/catch 中，您吞下了异常。您应该（以某种方式）在返回之前记录消息和/或堆栈跟踪。希望这将提供有关问题所在的更多信息。