SmtpResponse.ServiceUnavailable field
The ServiceUnavailable field gets an instance of the SmtpResponse structure that represents a 421 Service not available, closing transmission channel response.
Namespace: Microsoft.Exchange.Data.Transport.Smtp
Assembly: Microsoft.Exchange.Data.Transport (in Microsoft.Exchange.Data.Transport.dll)
Syntax
'Declaration
Public Shared ReadOnly ServiceUnavailable As SmtpResponse
'Usage
Dim value As SmtpResponse
value = SmtpResponse.ServiceUnavailable
public static readonly SmtpResponse ServiceUnavailable