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Exchange 2013 acting as an open relay

March 12, 2015, 1:35 pm
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Hi

I've inherited an Exchange 2013 server that is acting as an open relay.  I've looked at the connectors for send and receive and I can't see why it would allow relay to happen.  Any hints?

Send Connector:

AddressSpaces                : {SMTP:*;1}
AuthenticationCredential     :
CloudServicesMailEnabled     : False
Comment                      :
ConnectedDomains             : {}
ConnectionInactivityTimeOut  : 00:10:00
DNSRoutingEnabled            : True
DomainSecureEnabled          : False
Enabled                      : True
ErrorPolicies                : Default
ForceHELO                    : False
Fqdn                         :
FrontendProxyEnabled         : False
HomeMTA                      : Microsoft MTA
HomeMtaServerId              : KRYSTALMX
Identity                     : Internet
IgnoreSTARTTLS               : False
IsScopedConnector            : True
IsSmtpConnector              : True
MaxMessageSize               : 35 MB (36,700,160 bytes)
Name                         : Internet
Port                         : 25
ProtocolLoggingLevel         : None
RequireOorg                  : False
RequireTLS                   : False
SmartHostAuthMechanism       : None
SmartHosts                   : {}
SmartHostsString             :
SmtpMaxMessagesPerConnection : 20
SourceIPAddress              : 0.0.0.0
SourceRoutingGroup           : Exchange Routing Group (DWBGZMFD01QNBJR)
SourceTransportServers       : {KRYSTALMX}
TlsAuthLevel                 :
TlsCertificateName           :
TlsDomain                    :
UseExternalDNSServersEnabled : True

Receive Connectors:

RunspaceId                              : f896b683-39f9-4123-b026-e7c106cf7210
AuthMechanism                           : Tls, Integrated, BasicAuth, BasicAuthRequireTLS, ExchangeServer
Banner                                  :
BinaryMimeEnabled                       : True
Bindings                                : {192.168.1.4:2525}
ChunkingEnabled                         : True
DefaultDomain                           :
DeliveryStatusNotificationEnabled       : True
EightBitMimeEnabled                     : True
SmtpUtf8Enabled                         : False
BareLinefeedRejectionEnabled            : False
DomainSecureEnabled                     : False
EnhancedStatusCodesEnabled              : True
LongAddressesEnabled                    : False
OrarEnabled                             : False
SuppressXAnonymousTls                   : False
ProxyEnabled                            : False
AdvertiseClientSettings                 : False
Fqdn                                    : krystalmx.krystal.local
ServiceDiscoveryFqdn                    :
TlsCertificateName                      :
Comment                                 :
Enabled                                 : True
ConnectionTimeout                       : 00:10:00
ConnectionInactivityTimeout             : 00:05:00
MessageRateLimit                        : Unlimited
MessageRateSource                       : IPAddress
MaxInboundConnection                    : 5000
MaxInboundConnectionPerSource           : 20
MaxInboundConnectionPercentagePerSource : 2
MaxHeaderSize                           : 128 KB (131,072 bytes)
MaxHopCount                             : 60
MaxLocalHopCount                        : 12
MaxLogonFailures                        : 3
MaxMessageSize                          : 35 MB (36,700,160 bytes)
MaxProtocolErrors                       : 5
MaxRecipientsPerMessage                 : 200
PermissionGroups                        : ExchangeUsers, ExchangeServers, ExchangeLegacyServers, Custom
PipeliningEnabled                       : True
ProtocolLoggingLevel                    : None
RemoteIPRanges                          : {0.0.0.0-255.255.255.255}
RequireEHLODomain                       : False
RequireTLS                              : False
EnableAuthGSSAPI                        : False
ExtendedProtectionPolicy                : None
LiveCredentialEnabled                   : False
TlsDomainCapabilities                   : {}
Server                                  : KRYSTALMX
TransportRole                           : HubTransport
SizeEnabled                             : Enabled
TarpitInterval                          : 00:00:05
MaxAcknowledgementDelay                 : 00:00:30
AdminDisplayName                        :
ExchangeVersion                         : 0.1 (8.0.535.0)
Name                                    : Default Exchange2013
DistinguishedName                       : CN=Default Exchange2013,CN=SMTP Receive
                                          Connectors,CN=Protocols,CN=KRYSTALMX,CN=Servers,CN=Exchange Administrative
                                          Group (FYDIBOHF23SPDLT),CN=Administrative Groups,CN=Krystal,CN=Microsoft
                                          Exchange,CN=Services,CN=Configuration,DC=krystal,DC=local
Identity                                : KRYSTALMX\Default Exchange2013
Guid                                    : bc55ad7a-6265-4022-96d4-4ab4c48e88d9
ObjectCategory                          : krystal.local/Configuration/Schema/ms-Exch-Smtp-Receive-Connector
ObjectClass                             : {top, msExchSmtpReceiveConnector}
WhenChanged                             : 24/01/2015 09:39:43
WhenCreated                             : 24/01/2015 09:39:30
WhenChangedUTC                          : 24/01/2015 09:39:43
WhenCreatedUTC                          : 24/01/2015 09:39:30
OrganizationId                          :
Id                                      : KRYSTALMX\Default Exchange2013
OriginatingServer                       : KrystalDC.krystal.local
IsValid                                 : True
ObjectState                             : Unchanged

RunspaceId                              : f896b683-39f9-4123-b026-e7c106cf7210
AuthMechanism                           : Tls, Integrated, BasicAuth, BasicAuthRequireTLS, ExchangeServer
Banner                                  :
BinaryMimeEnabled                       : True
Bindings                                : {192.168.1.4:465}
ChunkingEnabled                         : True
DefaultDomain                           :
DeliveryStatusNotificationEnabled       : True
EightBitMimeEnabled                     : True
SmtpUtf8Enabled                         : False
BareLinefeedRejectionEnabled            : False
DomainSecureEnabled                     : False
EnhancedStatusCodesEnabled              : True
LongAddressesEnabled                    : False
OrarEnabled                             : False
SuppressXAnonymousTls                   : False
ProxyEnabled                            : False
AdvertiseClientSettings                 : False
Fqdn                                    : krystalmx.krystal.local
ServiceDiscoveryFqdn                    :
TlsCertificateName                      :
Comment                                 :
Enabled                                 : True
ConnectionTimeout                       : 00:10:00
ConnectionInactivityTimeout             : 00:05:00
MessageRateLimit                        : Unlimited
MessageRateSource                       : IPAddress
MaxInboundConnection                    : 5000
MaxInboundConnectionPerSource           : 20
MaxInboundConnectionPercentagePerSource : 2
MaxHeaderSize                           : 128 KB (131,072 bytes)
MaxHopCount                             : 60
MaxLocalHopCount                        : 12
MaxLogonFailures                        : 3
MaxMessageSize                          : 35 MB (36,700,160 bytes)
MaxProtocolErrors                       : 5
MaxRecipientsPerMessage                 : 200
PermissionGroups                        : ExchangeUsers, ExchangeServers, Custom
PipeliningEnabled                       : True
ProtocolLoggingLevel                    : None
RemoteIPRanges                          : {0.0.0.0-255.255.255.255}
RequireEHLODomain                       : False
RequireTLS                              : False
EnableAuthGSSAPI                        : False
ExtendedProtectionPolicy                : None
LiveCredentialEnabled                   : False
TlsDomainCapabilities                   : {}
Server                                  : KRYSTALMX
TransportRole                           : HubTransport
SizeEnabled                             : Enabled
TarpitInterval                          : 00:00:05
MaxAcknowledgementDelay                 : 00:00:30
AdminDisplayName                        :
ExchangeVersion                         : 0.1 (8.0.535.0)
Name                                    : ClientProxy Exchange2013
DistinguishedName                       : CN=ClientProxy Exchange2013,CN=SMTP Receive
                                          Connectors,CN=Protocols,CN=KRYSTALMX,CN=Servers,CN=Exchange Administrative
                                          Group (FYDIBOHF23SPDLT),CN=Administrative Groups,CN=Krystal,CN=Microsoft
                                          Exchange,CN=Services,CN=Configuration,DC=krystal,DC=local
Identity                                : KRYSTALMX\ClientProxy Exchange2013
Guid                                    : 2255a890-0067-47ab-b15d-b58519bcccb3
ObjectCategory                          : krystal.local/Configuration/Schema/ms-Exch-Smtp-Receive-Connector
ObjectClass                             : {top, msExchSmtpReceiveConnector}
WhenChanged                             : 24/01/2015 09:40:50
WhenCreated                             : 24/01/2015 09:40:49
WhenChangedUTC                          : 24/01/2015 09:40:50
WhenCreatedUTC                          : 24/01/2015 09:40:49
OrganizationId                          :
Id                                      : KRYSTALMX\ClientProxy Exchange2013
OriginatingServer                       : KrystalDC.krystal.local
IsValid                                 : True
ObjectState                             : Unchanged

RunspaceId                              : f896b683-39f9-4123-b026-e7c106cf7210
AuthMechanism                           : Tls, Integrated, BasicAuth, BasicAuthRequireTLS, ExchangeServer
Banner                                  :
BinaryMimeEnabled                       : True
Bindings                                : {192.168.1.4:25}
ChunkingEnabled                         : True
DefaultDomain                           :
DeliveryStatusNotificationEnabled       : True
EightBitMimeEnabled                     : True
SmtpUtf8Enabled                         : False
BareLinefeedRejectionEnabled            : False
DomainSecureEnabled                     : False
EnhancedStatusCodesEnabled              : True
LongAddressesEnabled                    : False
OrarEnabled                             : False
SuppressXAnonymousTls                   : False
ProxyEnabled                            : False
AdvertiseClientSettings                 : False
Fqdn                                    : KRYSTALMX
ServiceDiscoveryFqdn                    :
TlsCertificateName                      :
Comment                                 :
Enabled                                 : True
ConnectionTimeout                       : 00:10:00
ConnectionInactivityTimeout             : 00:05:00
MessageRateLimit                        : Unlimited
MessageRateSource                       : IPAddress
MaxInboundConnection                    : 5000
MaxInboundConnectionPerSource           : 20
MaxInboundConnectionPercentagePerSource : 2
MaxHeaderSize                           : 128 KB (131,072 bytes)
MaxHopCount                             : 60
MaxLocalHopCount                        : 12
MaxLogonFailures                        : 3
MaxMessageSize                          : 35 MB (36,700,160 bytes)
MaxProtocolErrors                       : 5
MaxRecipientsPerMessage                 : 200
PermissionGroups                        : AnonymousUsers, ExchangeServers, ExchangeLegacyServers, Custom
PipeliningEnabled                       : True
ProtocolLoggingLevel                    : None
RemoteIPRanges                          : {0.0.0.0-255.255.255.255}
RequireEHLODomain                       : False
RequireTLS                              : False
EnableAuthGSSAPI                        : False
ExtendedProtectionPolicy                : None
LiveCredentialEnabled                   : False
TlsDomainCapabilities                   : {}
Server                                  : KRYSTALMX
TransportRole                           : FrontendTransport
SizeEnabled                             : Enabled
TarpitInterval                          : 00:00:05
MaxAcknowledgementDelay                 : 00:00:30
AdminDisplayName                        :
ExchangeVersion                         : 0.1 (8.0.535.0)
Name                                    : Default Frontend Exchange2013
DistinguishedName                       : CN=Default Frontend Exchange2013,CN=SMTP Receive
                                          Connectors,CN=Protocols,CN=KRYSTALMX,CN=Servers,CN=Exchange Administrative
                                          Group (FYDIBOHF23SPDLT),CN=Administrative Groups,CN=Krystal,CN=Microsoft
                                          Exchange,CN=Services,CN=Configuration,DC=krystal,DC=local
Identity                                : KRYSTALMX\Default Frontend Exchange2013
Guid                                    : 56733f09-ae32-4f45-91be-bf51fb6a3046
ObjectCategory                          : krystal.local/Configuration/Schema/ms-Exch-Smtp-Receive-Connector
ObjectClass                             : {top, msExchSmtpReceiveConnector}
WhenChanged                             : 03/02/2015 10:21:30
WhenCreated                             : 24/01/2015 11:12:08
WhenChangedUTC                          : 03/02/2015 10:21:30
WhenCreatedUTC                          : 24/01/2015 11:12:08
OrganizationId                          :
Id                                      : KRYSTALMX\Default Frontend Exchange2013
OriginatingServer                       : KrystalDC.krystal.local
IsValid                                 : True
ObjectState                             : Unchanged

RunspaceId                              : f896b683-39f9-4123-b026-e7c106cf7210
AuthMechanism                           : Tls, Integrated, BasicAuth, BasicAuthRequireTLS, ExchangeServer
Banner                                  :
BinaryMimeEnabled                       : True
Bindings                                : {192.168.1.4:717}
ChunkingEnabled                         : True
DefaultDomain                           :
DeliveryStatusNotificationEnabled       : True
EightBitMimeEnabled                     : True
SmtpUtf8Enabled                         : False
BareLinefeedRejectionEnabled            : False
DomainSecureEnabled                     : False
EnhancedStatusCodesEnabled              : True
LongAddressesEnabled                    : False
OrarEnabled                             : False
SuppressXAnonymousTls                   : False
ProxyEnabled                            : False
AdvertiseClientSettings                 : False
Fqdn                                    : krystalmx.krystal.local
ServiceDiscoveryFqdn                    :
TlsCertificateName                      :
Comment                                 :
Enabled                                 : True
ConnectionTimeout                       : 00:10:00
ConnectionInactivityTimeout             : 00:05:00
MessageRateLimit                        : Unlimited
MessageRateSource                       : IPAddress
MaxInboundConnection                    : 5000
MaxInboundConnectionPerSource           : 20
MaxInboundConnectionPercentagePerSource : 2
MaxHeaderSize                           : 128 KB (131,072 bytes)
MaxHopCount                             : 60
MaxLocalHopCount                        : 12
MaxLogonFailures                        : 3
MaxMessageSize                          : 35 MB (36,700,160 bytes)
MaxProtocolErrors                       : 5
MaxRecipientsPerMessage                 : 200
PermissionGroups                        : ExchangeUsers, ExchangeServers, ExchangeLegacyServers, Custom
PipeliningEnabled                       : True
ProtocolLoggingLevel                    : None
RemoteIPRanges                          : {0.0.0.0-255.255.255.255}
RequireEHLODomain                       : False
RequireTLS                              : False
EnableAuthGSSAPI                        : False
ExtendedProtectionPolicy                : None
LiveCredentialEnabled                   : False
TlsDomainCapabilities                   : {}
Server                                  : KRYSTALMX
TransportRole                           : FrontendTransport
SizeEnabled                             : Enabled
TarpitInterval                          : 00:00:05
MaxAcknowledgementDelay                 : 00:00:30
AdminDisplayName                        :
ExchangeVersion                         : 0.1 (8.0.535.0)
Name                                    : Outbound Proxy Frontend Exchange2013
DistinguishedName                       : CN=Outbound Proxy Frontend Exchange2013,CN=SMTP Receive
                                          Connectors,CN=Protocols,CN=KRYSTALMX,CN=Servers,CN=Exchange Administrative
                                          Group (FYDIBOHF23SPDLT),CN=Administrative Groups,CN=Krystal,CN=Microsoft
                                          Exchange,CN=Services,CN=Configuration,DC=krystal,DC=local
Identity                                : KRYSTALMX\Outbound Proxy Frontend Exchange2013
Guid                                    : bd749317-68c5-4b4d-b401-166e7fac3b92
ObjectCategory                          : krystal.local/Configuration/Schema/ms-Exch-Smtp-Receive-Connector
ObjectClass                             : {top, msExchSmtpReceiveConnector}
WhenChanged                             : 03/02/2015 13:51:43
WhenCreated                             : 24/01/2015 11:13:12
WhenChangedUTC                          : 03/02/2015 13:51:43
WhenCreatedUTC                          : 24/01/2015 11:13:12
OrganizationId                          :
Id                                      : KRYSTALMX\Outbound Proxy Frontend Exchange2013
OriginatingServer                       : KrystalDC.krystal.local
IsValid                                 : True
ObjectState                             : Unchanged

RunspaceId                              : f896b683-39f9-4123-b026-e7c106cf7210
AuthMechanism                           : Tls, Integrated, BasicAuth, BasicAuthRequireTLS
Banner                                  :
BinaryMimeEnabled                       : True
Bindings                                : {192.168.1.4:587}
ChunkingEnabled                         : True
DefaultDomain                           :
DeliveryStatusNotificationEnabled       : True
EightBitMimeEnabled                     : True
SmtpUtf8Enabled                         : False
BareLinefeedRejectionEnabled            : False
DomainSecureEnabled                     : False
EnhancedStatusCodesEnabled              : True
LongAddressesEnabled                    : False
OrarEnabled                             : False
SuppressXAnonymousTls                   : False
ProxyEnabled                            : False
AdvertiseClientSettings                 : False
Fqdn                                    : krystalmx.krystal.local
ServiceDiscoveryFqdn                    :
TlsCertificateName                      :
Comment                                 :
Enabled                                 : True
ConnectionTimeout                       : 00:10:00
ConnectionInactivityTimeout             : 00:05:00
MessageRateLimit                        : Unlimited
MessageRateSource                       : IPAddress
MaxInboundConnection                    : 5000
MaxInboundConnectionPerSource           : 20
MaxInboundConnectionPercentagePerSource : 2
MaxHeaderSize                           : 128 KB (131,072 bytes)
MaxHopCount                             : 60
MaxLocalHopCount                        : 12
MaxLogonFailures                        : 3
MaxMessageSize                          : 35 MB (36,700,160 bytes)
MaxProtocolErrors                       : 5
MaxRecipientsPerMessage                 : 200
PermissionGroups                        : ExchangeUsers, Custom
PipeliningEnabled                       : True
ProtocolLoggingLevel                    : None
RemoteIPRanges                          : {0.0.0.0-255.255.255.255}
RequireEHLODomain                       : False
RequireTLS                              : False
EnableAuthGSSAPI                        : False
ExtendedProtectionPolicy                : None
LiveCredentialEnabled                   : False
TlsDomainCapabilities                   : {}
Server                                  : KRYSTALMX
TransportRole                           : FrontendTransport
SizeEnabled                             : Enabled
TarpitInterval                          : 00:00:05
MaxAcknowledgementDelay                 : 00:00:30
AdminDisplayName                        :
ExchangeVersion                         : 0.1 (8.0.535.0)
Name                                    : Client Frontend Exchange2013
DistinguishedName                       : CN=Client Frontend Exchange2013,CN=SMTP Receive
                                          Connectors,CN=Protocols,CN=KRYSTALMX,CN=Servers,CN=Exchange Administrative
                                          Group (FYDIBOHF23SPDLT),CN=Administrative Groups,CN=Krystal,CN=Microsoft
                                          Exchange,CN=Services,CN=Configuration,DC=krystal,DC=local
Identity                                : KRYSTALMX\Client Frontend Exchange2013
Guid                                    : 52f3d6e9-5a79-4055-8d39-61235bf3627e
ObjectCategory                          : krystal.local/Configuration/Schema/ms-Exch-Smtp-Receive-Connector
ObjectClass                             : {top, msExchSmtpReceiveConnector}
WhenChanged                             : 24/01/2015 11:14:23
WhenCreated                             : 24/01/2015 11:14:23
WhenChangedUTC                          : 24/01/2015 11:14:23
WhenCreatedUTC                          : 24/01/2015 11:14:23
OrganizationId                          :
Id                                      : KRYSTALMX\Client Frontend Exchange2013
OriginatingServer                       : KrystalDC.krystal.local
IsValid                                 : True
ObjectState                             : Unchanged

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