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Reverse DNS does not match SMTP Banner

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I am having issues with some company's not being able to send emails to staff on our exchange server because it fails a Ehlo test. the users sending the email get the following message.

<User@renfrewhosp.com>:
host exchange.renfrewhosp.com[142.46.224.120] said:
554 5.7.1 This message has been blocked because the HELO/EHLO
domain is invalid. (in reply to MAIL FROM command)  now our Exchange servers domain is not the same as our email address domain. I have set the FQDN on the send connector to renfrewhosp.com but when I go to change the receive connector I get the following error

error

If the AuthMechanism attribute on a Receive connector contains the value ExchangeServer, you must set the FQDN parameter on the Receive connector to one of the following values: the FQDN of the transport server "EXCH01.rvh-win2k3.com", the NetBIOS name of the transport server "EXCH01", or $null.

any help would be appreciated. I'm running exchange 2013 cu6 on server 2012.


Devin Berard I.T Support Renfrew Victoria Hospital, Renfrew ON berardd@renfrewhosp.com


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