SmtpClient Problem

  • Thread starter Thread starter BigDave
  • Start date Start date
B

BigDave

Hi,

I'm having problems with SmtpClient. I have the following set in my
web.config:

<configuration>
<system.net>
<mailSettings>
<smtp>
<network host="mysmtp" port="25" userName="myuser"
password="mypass" defaultCredentials="true" />
</smtp>
</mailSettings>
</system.net>
.... lots of other stuff
</configuration>

Now, this code doesn't send the mail (which is the problem)

protected void SendEmail_Click(object sender, EventArgs e)
{

MailMessage message = new MailMessage();
message.To.Add(new MailAddress("toMail"));
message.From = new MailAddress("Frommail");
message.Subject = "This is my subject";
message.Body = "This is the content";

SmtpClient client = new SmtpClient();
try
{
client.Send(message);
Response.Write("Email sent correctly");
}
catch (Exception exc)
{
Response.Write("Send failure: " + exc.ToString());
}
}

But - this does work:

protected void SendEmail_Click(object sender, EventArgs e)
{

MailMessage message = new MailMessage();
message.To.Add(new MailAddress("toMail"));
message.From = new MailAddress("Frommail");
message.Subject = "This is my subject";
message.Body = "This is the content";

SmtpClient client = new SmtpClient("mySMTP", 25);
NetworkCredential SMTPUserInfo = new NetworkCredential
("myUser", "myPass");
client.UseDefaultCredentials = false;
client.Credentials = SMTPUserInfo;
try
{
client.Send(message);
Response.Write("Email sent correctly");
}
catch (Exception exc)
{
Response.Write("Send failure: " + exc.ToString());
}

}

So, it looks as though if I set the server and username etc manually,
it works, but if I use the default from web.config it doesn't.

Now, logic might say that it isn't reading the data from the
web.config, but I think it might be (at least partially) because I can
see the smtp server in the SmtpClient properties.

Any idea?

Thanks

David
 
<snip>

Just to confirm - if I use MailSettingsSectionGroup to get the config
settings, they are all there.


So this is quite confusing - if I use the default settings it doesn't
work, if I set them manually it does.
 
Yeah.

Don't rely on the default configuration stuff.
Click to expand...

Thanks, that's a good idea - using XML. And I think I'll do that as a
solution.

It's still beyond me why the default stuff isn't working. If anyone
knows I'd be grateful.


David
 
The config file is using the default credentials while your code doesn't.
What if you use defaultCredentials="false" instead ?
Click to expand...

Yes that worked. Thanks.

The documentation (that I have) on this is sparse. What does
defaultCredentials do?

I assumed that if it was set to true, and you set up the email
settings like I have, it would use *those* automatically? Obviously
this isn't the case - if you could point me towards some documentation
that would be great.

Thanks again.

David
 
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