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Exchange 2013 receive connector keeps ignoring authentication (or lack of it).

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I have an Exchange 2013 CU1 that I have setup many receive connectors up for but seem to have a problematic one in particular.

The setup is to allow anonymous (yes I have run the ADD-ADPermission cmdlet) and is restricted down to the one IP for the remote host receive information. This is required due to the nature of the application I am using on the remote PC.

So, the error that comes up is a typical error:
530 5.7.1 Client was not authenticated

Also, I can telnet into the Exchange Server and get the same failure after the mail from: my@emailaddress.com

So, to fix this, I have to disable the receive connector in the ECP, wait a little while (a minutes or so) and then enable. I can now use the application to send logs via mail and also get all the expected responses and completed telnet session to send mail.

This isn't a suitable workaround as I only receive a small portion of the logs before the system falls over and I have to repeat the process again.

Here is my Receive connector config. Thanks in advance

PSComputerName                          : myserver.net
RunspaceId                              : c5ca7f81-e502-4453-ab52-27d6b44fe614
PSShowComputerName                      : False
AuthMechanism                           : None
Banner                                  : 
BinaryMimeEnabled                       : True
Bindings                                : {0.0.0.0:25}
ChunkingEnabled                         : True
DefaultDomain                           : 
DeliveryStatusNotificationEnabled       : True
EightBitMimeEnabled                     : True
BareLinefeedRejectionEnabled            : False
DomainSecureEnabled                     : False
EnhancedStatusCodesEnabled              : True
LongAddressesEnabled                    : False
OrarEnabled                             : False
SuppressXAnonymousTls                   : False
ProxyEnabled                            : False
AdvertiseClientSettings                 : False
Fqdn                                    : myserver.net
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, Custom
PipeliningEnabled                       : True
ProtocolLoggingLevel                    : None
RemoteIPRanges                          : {xxx.xxx.xxx.xxx}
RequireEHLODomain                       : False
RequireTLS                              : False
EnableAuthGSSAPI                        : False
ExtendedProtectionPolicy                : None
LiveCredentialEnabled                   : False
TlsDomainCapabilities                   : {}
Server                                  : MYSERVER
TransportRole                           : HubTransport
SizeEnabled                             : Enabled
TarpitInterval                          : 00:00:05
MaxAcknowledgementDelay                 : 00:00:30
AdminDisplayName                        : 
ExchangeVersion                         : 0.1 (8.0.535.0)
Name                                    : Allow relay from MYSERVER
Groups,CN=company Ltd,CN=Microsoft 
                                          Guid                                    : 1186dca7-7372-47f7-a950-fd1ac490cfc8
ObjectCategory                          : domain.net/Configuration/Schema/ms-Exch-Smtp-Receive-Connector
ObjectClass                             : {top, msExchSmtpReceiveConnector}
WhenChanged                             : 6/19/2013 1:49:06 PM
WhenCreated                             : 6/13/2013 5:09:27 PM
WhenChangedUTC                          : 6/19/2013 1:49:06 AM
WhenCreatedUTC                          : 6/13/2013 5:09:27 AM
OrganizationId                          : 
OriginatingServer                       : MYDC.domain.net
IsValid                                 : True
ObjectState                             : Unchanged



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