Question

Here is the code i wrote to send email,

MailMessage m = new MailMessage();
SmtpClient sc = new SmtpClient();
sc.UseDefaultCredentials = false;

try
{
    m.From = new MailAddress(Sender);
    m.To.Add(new MailAddress(Receiver));
    m.Subject = Subject;
    m.IsBodyHtml = true;
    m.Body = Body;

    sc.Send(m);
}
catch (Exception ex) { _Exceptions.ManageExceptions(ex); }

And the config file settings:

<system.net>
    <mailSettings>
        <smtp deliveryMethod="Network" from="[e-mail]">
            <network host="192.168.0.170" userName="setsdom01\user1" password="xxx" port="25" />
        </smtp>
    </mailSettings>
</system.net>

It executes when i run it from my machine, i try on different PC and it is giving me the following message: …message rejected as spam by content filtering..

What could be the problem?

Answer 1

I think you need to add NetworkCredential backend code.

var AuthenticationDetails = new NetworkCredential("xxx@", "xxxx");
sc.Credentials = AuthenticationDetails;

This might work

Also look this How to Enable and Configure the Spam Confidence Level Thresholds may be helpful