I can send email with Explicit SSL in C# with SmtpClient, but i cannot send by Implicit SSL(TLS). are there any solution for this.
I want yo use yahoo mail to send a message from my C# program.
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This is probably a duplicate of http://stackoverflow.com/questions/2057227/c-sharp-asp-net-send-email-via-tls – Ferdinand Swaters May 15 '16 at 11:18
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You can use explicit TLS with yahoo on port 587, see https://help.yahoo.com/kb/SLN4075.html. – Steffen Ullrich May 15 '16 at 11:46
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no. i can't. the c sharp code cannot send on port 587. the error is: "Fauiler sending message" – user2352554 May 15 '16 at 11:50
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A short tests (w/o C#) shows that using explicit TLS with smtp.mail.yahoo.com:587 works and there are also [examples for this in C#](http://www.codeproject.com/Tips/520998/Send-Email-from-Yahoo-GMail-Hotmail-Csharp). So it might be a problem with your code instead. – Steffen Ullrich May 15 '16 at 12:14