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Authenticatio Error
Problem reported by Vince - 3/3/2022 at 12:37 PM
Submitted
Im getting an error when a client is trying to authenticate. THe message is below. I replaced the ip addresses with *

Anyone know what this means

cmd: STARTTLS
[2022.03.03] 12:56:20.443 [*.*.*.*][43119453] rsp: 220 Start TLS negotiation
[2022.03.03] 12:56:20.458 [*.*.*.*][43119453] rsp: 554 Security failure
[2022.03.03] 12:56:20.458 [*.*.*.*][43119453] Exception negotiating TLS session: System.Security.Authentication.AuthenticationException: A call to SSPI failed, see inner exception. ---> System.ComponentModel.Win32Exception: The certificate chain was issued by an authority that is not trusted
[2022.03.03]    --- End of inner exception stack trace ---   at System.Net.Security.SslState.StartSendAuthResetSignal(ProtocolToken message, AsyncProtocolRequest asyncRequest, Exception exception)   at System.Net.Security.SslState.CheckCompletionBeforeNextReceive(ProtocolToken message, AsyncProtocolRequest asyncRequest)   at System.Net.Security.SslState.ProcessReceivedBlob(Byte[] buffer, Int32 count, AsyncProtocolRequest asyncRequest)   at System.Net.Security.SslState.StartReceiveBlob(Byte[] buffer, AsyncProtocolRequest asyncRequest)   at System.Net.Security.SslState.CheckCompletionBeforeNextReceive(ProtocolToken message, AsyncProtocolRequest asyncRequest)   at System.Net.Security.SslState.ProcessReceivedBlob(Byte[] buffer, Int32 count, AsyncProtocolRequest asyncRequest)   at System.Net.Security.SslState.StartReceiveBlob(Byte[] buffer, AsyncProtocolRequest asyncRequest)   at System.Net.Security.SslState.ForceAuthentication(Boolean receiveFirst, Byte[] buffer, AsyncProtocolRequest asyncRequest)   at System.Net.Security.SslState.ProcessAuthentication(LazyAsyncResult lazyResult)   at MailService.TcpServerLib.Common.PooledTcpItem.ConvertToSSL(db_system_binding_port setting, Log log, String sessionId)   at MailService.TcpServerLib.SMTP.SMTPSession.STARTTLS()12:56:20.458 [*.*.*.*][43119453] disconnected at 3/3/2022 12:56:20 PM

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Kyle Kerst Replied
Employee Post
This error means that the certificate in use is validated by an authority that is considered untrusted. If you use Let's Encrypt on this server you may need to apply updates as they recently invalidated one of the certificate authorities. 
Kyle Kerst IT Coordinator SmarterTools Inc. www.smartertools.com
0
Rikki Cupp Replied
Thanks for your answer. It helped me a lot. 

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