Mail Flow

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

Post Views: 12,769 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…

SMTP Relay in Office 365 environment | Troubleshooting scenarios |Part 4#4 5/5 (2)

Post Views: 31,662 The current article is dedicated the subject on – troubleshooting possible problems when using an SMTP mail relay server for sending mail to the Office 365 mail infrastructure. Send mail to Exchange Online – Article Series Send mail to Exchange Online | Part 1#4 Send mail to Exchange Online using standard SMTP…