https://community.cisco.com/t5/network-security/exchange-hybrid-mail-flow-rpf-violated-question/m-p/3993684#M1050476 <P>Successfully deployed an Exchange hybrid with our on-prem exchange 2013 dag....to an extent. I can mail on-prem to E365, but when trying to send from E365 to on-prem, my ASA5515 is blocking due to an rpf-violation. Mail flow originates at our outbound wan ip 69.xx.xx.20 and then comes inbound to 69.xx.xx.6 (mail.on-prem-exchange) so the Unicast policy thinks it is a spoofed ip. Is there any way to fix this? Sorry for the newb question, but appreciate any help (our external ASA support vendor is unavailable at the moment).</P> Fri, 21 Feb 2020 17:44:41 GMT CovNasa 2020-02-21T17:44:41Z https://community.cisco.com/t5/network-security/exchange-hybrid-mail-flow-rpf-violated-question/m-p/3993684#M1050476 <P>Successfully deployed an Exchange hybrid with our on-prem exchange 2013 dag....to an extent. I can mail on-prem to E365, but when trying to send from E365 to on-prem, my ASA5515 is blocking due to an rpf-violation. Mail flow originates at our outbound wan ip 69.xx.xx.20 and then comes inbound to 69.xx.xx.6 (mail.on-prem-exchange) so the Unicast policy thinks it is a spoofed ip. Is there any way to fix this? Sorry for the newb question, but appreciate any help (our external ASA support vendor is unavailable at the moment).</P> Fri, 21 Feb 2020 17:44:41 GMT https://community.cisco.com/t5/network-security/exchange-hybrid-mail-flow-rpf-violated-question/m-p/3993684#M1050476 CovNasa 2020-02-21T17:44:41Z