I have a problem in sending email to non-local address, say: yahoo email, gmail, etc.

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I have a problem in sending email to non-local address, say: yahoo email, gmail, etc. But no problem when sending email to local address, say: sending email to myself.

However, I still get an error saying: "Bad sequence of commands. The server response was: This mail server requires authentication when attempting to send to a non-local e-mail address. Please check your mail client settings or contact your administrator to verify that the domain or address is defined for this server."

Please reply me as soon as possible.

with bundle of thanks!

Posted 18-Jul-12 21:14pm

Muhammad Fahim Baloch

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Christian Graus · Answer 1 · 2012-07-18T21:16:00

Solution 1

The error means what it says. Your mail server requires authentication, so, a username and password, to send to a non local address.

Posted 18-Jul-12 21:16pm

Christian Graus

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Muhammad Fahim Baloch 19-Jul-12 4:17am

but i used required authentication
my code for authentication is

//-------------------------------------------------------------------------------------------
SmtpClient mySmtpClient = new SmtpClient();
System.Net.NetworkCredential myCredential = new System.Net.NetworkCredential("tehnical@mydomain.com", "Password");
mySmtpClient.Host = "mail.mydomain.com";
mySmtpClient.DeliveryMethod = SmtpDeliveryMethod.Network;
mySmtpClient.UseDefaultCredentials = false;
mySmtpClient.Credentials = myCredential;

//-------------------------------------------------------------------------------------------

OriginalGriff · Answer 2 · 2012-07-18T21:25:00

Solution 2

You need to include your Gmail login details when you try to send via them. Have a look at this: Sending an Email in C# with or without attachments: generic routine.[^]

Posted 18-Jul-12 21:25pm

OriginalGriff