MailBeeSmtpOptionalCommandNotSupportedException Class
The exception that is thrown when the SMTP server responds with a negative reply to an optional SMTP command.
Inheritance Hierarchy

Namespace: MailBee.SmtpMail
Assembly: MailBee.NET (in MailBee.NET.dll) Version: 11.2.0 build 590 for .NET 4.5
Syntax
[SerializableAttribute]
public class MailBeeSmtpOptionalCommandNotSupportedException : MailBeeSmtpNegativeResponseException

The MailBeeSmtpOptionalCommandNotSupportedException type exposes the following members.

Constructors
  NameDescription
Protected methodMailBeeSmtpOptionalCommandNotSupportedException
Initializes a new instance of the MailBeeSmtpOptionalCommandNotSupportedException class
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Methods
  NameDescription
Public methodEquals
Determines whether the specified object is equal to the current object.
(Inherited from Object.)
Protected methodFinalize
Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.
(Inherited from Object.)
Public methodGetBaseException
When overridden in a derived class, returns the Exception that is the root cause of one or more subsequent exceptions.
(Inherited from Exception.)
Public methodGetHashCode
Serves as the default hash function.
(Inherited from Object.)
Public methodGetObjectData
When overridden in a derived class, sets the SerializationInfo with information about the exception.
(Inherited from Exception.)
Public methodGetType
Gets the runtime type of the current instance.
(Inherited from Exception.)
Protected methodMemberwiseClone
Creates a shallow copy of the current Object.
(Inherited from Object.)
Public methodToString
Creates and returns a string representation of the current exception.
(Inherited from Exception.)
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Properties
  NameDescription
Public propertyData
Gets a collection of key/value pairs that provide additional user-defined information about the exception.
(Inherited from Exception.)
Public propertyErrorCode
Gets the error code.
(Inherited from MailBeeException.)
Public propertyHelpLink
Gets or sets a link to the help file associated with this exception.
(Inherited from Exception.)
Public propertyHResult
Gets or sets HRESULT, a coded numerical value that is assigned to a specific exception.
(Inherited from Exception.)
Public propertyInnerException
Gets the Exception instance that caused the current exception.
(Inherited from Exception.)
Public propertyIsTransientError
Gets the status of whether the failure is permanent (the client should not retry later) or transient (the client may retry later).
(Inherited from MailBeeSmtpNegativeResponseException.)
Public propertyMessage
Gets a message that describes the current exception.
(Inherited from Exception.)
Public propertyProtocol
Gets application-level protocol of the current connection.
(Inherited from MailBeeRemoteHostException.)
Public propertyRemoteEndPoint
Gets a reference to the end point of the server host.
(Inherited from MailBeeRemoteHostException.)
Public propertyRemoteHostName
Gets the host name of the server.
(Inherited from MailBeeRemoteHostException.)
Public propertyResponseCode
Gets a 3-digit SMTP response status code.
(Inherited from MailBeeSmtpNegativeResponseException.)
Public propertyResponseEncoding
Gets the encoding which was used to convert response bytes received from the server into a string.
(Inherited from MailBeeEmailProtocolNegativeResponseException.)
Public propertyResponseString
Gets the string which contains the negative response data.
(Inherited from MailBeeEmailProtocolNegativeResponseException.)
Public propertySource
Gets or sets the name of the application or the object that causes the error.
(Inherited from Exception.)
Public propertyStackTrace
Gets a string representation of the immediate frames on the call stack.
(Inherited from Exception.)
Public propertyTargetSite
Gets the method that throws the current exception.
(Inherited from Exception.)
Public propertyWasConnected
Gets if the connection with the server had already been established to the moment when the exception occurred.
(Inherited from MailBeeRemoteHostException.)
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Events
  NameDescription
Protected eventSerializeObjectState
Occurs when an exception is serialized to create an exception state object that contains serialized data about the exception.
(Inherited from Exception.)
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Remarks

This exception is never thrown in the application code. Instead, MailBee catches it, and raises ErrorOccurred event passing the exception instance as the Reason parameter value.

This exception indicates the SMTP server does not support an optional SMTP command which was sent to the server by MailBee. For instance, MailBee may try to send EHLO command in order to to initiate SMTP session and learn the server capabilities. The SMTP server, however, may not support it. In this case, MailBee continues normal execution and tries regular HELO command to initiate SMTP session (although ESMTP extensions, which could be supported if the failed command succeeded, will now be disabled). However, ErrorOccurred event is still raised to let the application code know that some features will be disabled.

See Also