fox54
asked on
Exchange 2010 receive connector selection not working as expected
We have an Exchange 2010 with a couple of receive connector. I have configured one for receiving incoming mail from the Internet
Most of the incoming mail is working fine
The thing is that with some remote domains (that seem badly configurated like the smtp FQDN banner is an invalid domain name (.local) or the reverse DNS does not match and these servers try the StartTLS the receive connector selected by Exchange is the "Default" one even thoug my "Default" one is bound only to receive from my local private subnet. Checking Anonymous users permission this connector solved the problem but that seems odd since it's bound to my local subnet only. Server was checked and is not an open relay as the security right to relay has not been added on the Default Receive connector
Any logical explanation ?
Most of the incoming mail is working fine
The thing is that with some remote domains (that seem badly configurated like the smtp FQDN banner is an invalid domain name (.local) or the reverse DNS does not match and these servers try the StartTLS the receive connector selected by Exchange is the "Default" one even thoug my "Default" one is bound only to receive from my local private subnet. Checking Anonymous users permission this connector solved the problem but that seems odd since it's bound to my local subnet only. Server was checked and is not an open relay as the security right to relay has not been added on the Default Receive connector
Any logical explanation ?
ASKER
That I know
what is scl value set in your environment?
ASKER
It has the default value
But I wonder what it may have to do with my problem
But I wonder what it may have to do with my problem
This question needs an answer!
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Please check the following URL with default configuration of the receive connectors.
https://blogs.technet.microsoft.com/rmilne/2018/04/03/exchange-2010-default-connector-configuration/