We recently transitioned from Exchange 2010 to 2013 and recreated all of our Receive Connectors with the same configuration. Since switching some of our bulk email applications, we have noticed that throughput has decreased dramatically. Where it took a few minutes to send 1,700 emails, it now takes almost an hour. Are there any new throttling options in Exchange 2013 that are not set on the Receive Connector?
These are the settings on the connector:
BinaryMimeEnabled : TrueChunkingEnabled : True
DeliveryStatusNotificationEnabled : True
EightBitMimeEnabled : True
SmtpUtf8Enabled : False
BareLinefeedRejectionEnabled : False
DomainSecureEnabled : False
EnhancedStatusCodesEnabled : True
LongAddressesEnabled : False
OrarEnabled : False
SuppressXAnonymousTls : False
ProxyEnabled : False
AdvertiseClientSettings : False
Enabled : True
ConnectionTimeout : 00:59:00
ConnectionInactivityTimeout : 00:20:00
MessageRateLimit : Unlimited
MessageRateSource : IPAddress
MaxInboundConnection : Unlimited
MaxInboundConnectionPerSource : Unlimited
MaxInboundConnectionPercentagePerSource : 100
MaxHeaderSize : 128 KB (131,072 bytes)
MaxHopCount : 60
MaxLocalHopCount : 5
MaxLogonFailures : 3
MaxMessageSize : 35 MB (36,700,160 bytes)
MaxProtocolErrors : 5
MaxRecipientsPerMessage : 10000
PermissionGroups : AnonymousUsers, Custom
PipeliningEnabled : True
ProtocolLoggingLevel : Verbose
RequireEHLODomain : False
RequireTLS : False
EnableAuthGSSAPI : False
ExtendedProtectionPolicy : None
LiveCredentialEnabled : False
TlsDomainCapabilities : {}
TransportRole : FrontendTransport
SizeEnabled : Enabled
TarpitInterval : 00:00:00
MaxAcknowledgementDelay : 00:00:00
ExchangeVersion : 0.1 (8.0.535.0)
Name : Relay - External