c#authenticationcredentialshostsmtpclient
Visual C# SmtpClient could never get authenticated
I have tried gmail, yahoo, and hotmail hosts, and I'm 100% sure that my username and password is correct. But no matter how I tried, I could NEVER get my credential authenticated.
It keep showing me this error:
The Chinese part roughly means "SMTP Server Required a Secure Connection, or the Client Credential is not Authenticated. Server Replies: 5.7.1"
Where did I go wrong?
Solution
Try to declare your client.Credentials after client.UseDefaultCredentials
client.UseDefaultCredentials = false;
client.Credentials = new blabla;
Just rearrange the codes something like you are composing email.
From
To
Subject
Email Body
then your Port, UseDefaultCredentials, Credentials and last one is Send
You have to see this similar to your problem.
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