I'm currently developing a website with a contact form. When the contact form is filled, an email must be sent to the person who have inserted this.
I'm using SMTP.
I'm using a shared email server.
My code looks like:
Task.Factory.StartNew(() =>
{
try
{
var smtpClient = new SmtpClient(SmtpHost, Port)
{
DeliveryMethod = SmtpDeliveryMethod.Network,
UseDefaultCredentials = false,
Credentials = new NetworkCredential(From, Password)
};
using (smtpClient)
{
using (MailMessage mailMessage = new MailMessage(From, From, "test", "test"))
{
smtpClient.Send(mailMessage);
}
}
}
catch (Exception e)
{
}
});
Everytime, I receive the following exception:
[System.Net.Mail.SmtpException] = {"Transaction failed. The server response is: 5.7.1 Recipient address rejected: Authentication required"} bij System.Net.Mail.RecipientCommand.CheckResponse(SmtpStatusCode statusCode, String response) bij System.Net.Mail.RecipientCommand.Send(SmtpConnection conn, String to, String& response) bij System.Net.Mail.SmtpTransport.SendMail(MailAddress sender, MailAddressCollection recipients, String deliveryNotify, Boolean allowUnicode, SmtpFailedRecipientException& exception) bij System.Net.Mail.SmtpClient.Send(MailMessage message)
In the code example I try to send an email to the same address as the sender. I already tried to send an email to my personal email accounts and this also fails.
Anyone knows what is going wrong here? I didn't found solutions on google/stackoverflow.
A few months ago, I developed a website with the same smtp host (but other domain) and this is still working fine..
Thank you.
