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MailBee.NET SMTP

AfterLogic Forum : MailBee.NET SMTP

Topic: A call to SSPI failed error

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jleely
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Joined: 25 October 2016
Location: United States
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Posted: 25 October 2016 at 3:07pm \| IP Logged

Hi, we're using MailBee.NET.45 and SmtpClient to send mail and we are getting an error "A call to SSPI failed. see inner exception" and the exception is not very helpful.

Has anyone experienced something similar? and how do you fix this?

Thanks in advance.

Igor
AfterLogic Support

Joined: 24 June 2008
Location: United States
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Posted: 26 October 2016 at 12:14am \| IP Logged

Can you please provide full exception message? Also, please post the section of your code where SSL-enabled access to SMTP server is configured (assuming that exists in your code of course).

--
Regards,
Igor, AfterLogic Support

jleely
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Joined: 25 October 2016
Location: United States
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Posted: 26 October 2016 at 9:57am \| IP Logged

This is the full exception message.

System.Security.Authentication.AuthenticationException: A call to SSPI failed, see inner exception. ---> System.ComponentModel.Win32Exception: The message received was unexpected or badly formatted

This is the code to initialize the SmtpServer object.
SmtpServer server = new SmtpServer();
server.Name = "smtp.test.com";
server.Port = 587 //or whatever port the user enters
server.SslMode = SslStartupMode.Manual
server.Password = "testPW";
server.AuthMethods = AuthenticationMethods.Auto
server.SslProtocol = //we set this to SecurityProtocol.Tls12 or SecurityProtocol.Tls11 or SecurityProtocol.Auto

To send we simply do:
SmtpClient client = new Smtp();
client.SmtpServers.Add(server);
client.Message = message;
client.Send();

Alex
AfterLogic Support

Joined: 19 November 2003
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Posts: 2206

Posted: 26 October 2016 at 10:00am \| IP Logged

Thanks. 587 is not SSL port, 465 is. Or, you'll need to use SslStartupMode.UseStartTls (in case if the server can switch to SSL connection on a regular port).

Regards,
Alex

jleely
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Joined: 25 October 2016
Location: United States
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Posts: 4

Posted: 26 October 2016 at 10:30am \| IP Logged

Hmm.. According to this http://www.afterlogic.com/mailbee-net/docs/smtp_over_ssl.html#Autodetect
I was under the impressions that if the mode is set to SslStartupMode.Manual, and port is 587, Mailbee.NET will use UseStartTlsIfSupported.

"If you explicitly specified the port 587 but haven't changed the SSL mode from the default value SslStartupMode.Manual, MailBee.NET will use SslStartupMode.UseStartTlsIfSupported."

Alex
AfterLogic Support

Joined: 19 November 2003
Online Status: Offline
Posts: 2206

Posted: 27 October 2016 at 1:46am \| IP Logged

For me, it works normally. Maybe you're using an older build. You can get the latest from http://www.afterlogic.com/updates/mailbee_net.zip

Regards,
Alex