As of a couple of days ago I have been receiveing the following error message, I do not remember changing any settings or downloading any programmes. What needs to be done to correct this..... Unable to connect to mail server(s). Please specify a valid mail server, server properties, or check your network connection. The following exception was also recorded: System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.IO.IOException: The handshake failed due to an unexpected packet format. at System.Net.Security.SslState.StartReadFrame(Byte[] buffer, Int32 readBytes, 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.StartSendBlob(Byte[] incoming, Int32 count, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.ForceAuthentication(Boolean receiveFirst, Byte[] buffer, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.ProcessAuthentication(LazyAsyncResult lazyResult) at System.Net.Security.SslStream.AuthenticateAsClient(String targetHost, X509CertificateCollection clientCertificates, SslProtocols enabledSslProtocols, Boolean checkCertificateRevocation) at System.Net.Security.SslStream.AuthenticateAsClient(String targetHost) at AdvancedIntellect.Ssl.SslSocket.StartTLS() --- End of inner exception stack trace --- at aspNetEmail.EmailMessage.?(String ) at aspNetEmail.EmailMessage.?()1 person got this answerI do too