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External client SMTP Relay with group alias in From address field -- fails to send
Here is the situation: 1. Using an inventory system that handles our packing and shipping lists a. System emails copies of shipment records to clients using SMTP relay i. Syst...
Hi TheCoreSquirrel,
Based on your scenario the best option is to implement "Option 3" on the following article https://docs.microsoft.com/en-us/exchange/mail-flow-best-practices/how-to-set-up-a-multifunction-device-or-application-to-send-email-using-office-3
For best security, please implement on your firewall that only your inventory system can contact Office 365 in port 25 or required servers.
Best regards,
Nuno Árias Silva
I provided the information to our IT admin and between the two of us we were able to determine the best option for our org.
We decided on using the option 3 in the technical article link above for using a connector to the Outlook SMTP relay. The article states it is a more complicated option but it turned out to be pretty easy to implement. As long as you can work with SPF and MX record settings it's really no big deal.
Tested it and works like a charm so long as its from our domain. Thanks for the solution!
Hi TheCoreSquirrel,
I'm glad that the option 3 has worked to this scenario.
Best regards,
Nuno Árias Silva
My blog about Microsot Technologies: http://www.nuno-silva.net/Blog
Office 365 Essentials Book - https://www.nuno-silva.net/book-office-365-essentials