If this MessagePart is a MultiPart message, then this property has a list of each of the Multiple parts that the message consists of.
It is a null reference if it is not a MultiPart message.
Use IsMultiPart to check if this MessagePart is a MultiPart message.
public List<MessagePart> MessageParts { public get; private set; }
See Also
MessagePart Class | OpenPop.Mime Namespace