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Alex Rivera
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I have been trying to send an email by C#. I have Googled for various examples and have taken bits and pieces from each and from the standard code which everyone would most probably be using. string to = "receiver@domain.com"; string from = "sender@domain.com"; string subject = "Hello World!"; string body = "Hello Body!"; MailMessage message = new MailMessage(from, to, subject, body); SmtpClient client = new SmtpClient("smtp.domain.com"); client.Credentials = new NetworkCredential("test@domain.com", "password"); client.Send(message); However, I keep getting an error stating System.Net.Mail.SmtpException: Mailbox unavailable. The server response was: Access denied - Invalid HELO name (See RFC2821 4.1.1.1) So, what do I do now? Is SmtpClient supposed to be special and only work on specific SMTP servers?
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