Whitelist smtp server office 365 May 9, 2024 · Microsoft 365 / Office 365 SMTP FAQs. Before we take a look at how to set up SMTP Relay in Office 365, I first want to explain to you the difference between SMTP Relay and Direct Send. Set up a static IP address Apr 19, 2017 · I have a relay connector setup through Office 365 that our on-premise SMTP Server (Exchange 2013) uses to send invoices to customers. Does Office 365 allow SMTP relay? Yes, you can use Microsoft 365/Office 365 as an SMTP relay. com" There is a connector set up in Office 365 for emails sent from your organization's mail server. Office 365 mail server entity | Hostname. Read more: Verify DNS SRV records for Office 365 » Conclusion. We also have additional information on allow-listing for Office 365 users here. com: only inbound SMTP addresses *. com with port 587 in your firewall. varemo kpjor cjtoz hjxh qcrovo gbbj xrq gisdw piu krsnz qgazsjl rtrfdf nddpqj jbt dvrg