New and updated transport agent APIs in Exchange 2013

Find out which APIs are new or updated in Exchange 2013 for transport agents.

Applies to: Exchange Server 2013

This article lists types that are new or updated in Exchange Server 2013 that affect transport agents. To learn about architectural changes in Exchange 2013 that affect transport agents, see Transport agent concepts in Exchange 2013.

New types for transport agent development in Exchange 2013

The following types are new in Exchange 2013:

• NextHopCategory

• RiskLevel

Updated types for transport agent development in Exchange 2013

The following types have been updated in Exchange 2013:

• ExchangeConfigurationException

• CalendarWriter

• TnefReader

• TnefWriter

• AddressHeader

• ComplexHeader

• EncodingFlags

• HeaderId

• HeaderList

• MimeComplianceStatus

• MimeGroup

• MimeNode

• MimePart.PartSubtree

• MimePart.SubtreeEnumerator

• BinHexEncoder

• ConverterStream

• ConverterWriter

• HtmlReader

• HtmlTagContext.AttributeCollection

• HtmlWriter

• HtmlWriter

• AcceptedDomainCollection

• EnvelopeRecipientCollection

• EnvelopeRecipientCollection.Enumerator

• MailItem

• PermissionCheckResults

• ReadOnlyEnvelopeRecipientCollection

• RecipientType

• RemoteDomainCollection

• RoutingAddress

• RoutingDomain

• RoutingHost

• RoutingOverride

• AttachmentCollection

• AttachmentCollection.Enumerator

• EmailRecipientCollection

• EmailRecipientCollection.Enumerator

• QueuedMessageEventSource

• RecipientExpansionInfo

• ResolvedMessageEventHandler

• ResolvedMessageEventSource

• RoutingAgent

• ConnectEventArgs

• DisconnectReason

• EhloCommandEventArgs

• MailCommandEventArgs

• ReceiveEventSource

• SmtpReceiveAgent

• SmtpResponse

• SmtpSession

See also

• Transport agent concepts in Exchange 2013
• Creating transport agents for Exchange 2013
• Transport agent reference for Exchange 2013