Configure Exchange Online inbound mail flow to accept SMTP connection only from a specific mail security gateway IP address 5/5 (5)

Post Views: 12,430 In the current article, we will review how to change the default Exchange Online incoming mail policy, which enables any host, to address Exchange Online using SMTP. A different way of describing such a scenario is – Block SMTP access of external mail servers to Exchange Online. In our scenario, we want…