Email Mail flow from Third Party Gateway to Exchange Online
Many organizations are using different email gateways (namely Proofpoint, Mime Cast, Ironport, Synmantec, Barracuda) instead of Exchange online protection. This blog is about a scenario from one of our customer that is using Cisco Ironport cloud and their current email routing from Internet is as below. Internet –> Ironport Cloud –> Exchange Onpremise –> Exchange…