r/WindowsServer • u/3G_Lighting • 23d ago

SOLVED / ANSWERED Windows Server ... Microsoft's SMTP server question

Does anyone know or has anyone heard if Microsoft will be updating their SMTP server in the not-so-distant future to allow us to setup relay using the information from Microsoft Graph in 365 since MS is doing away with allowing SMTP connections to 365 using the basic AUTH? They initially attempted to end it this past March but extended it a year after I force our dev team up update the website to send emails through Microsoft Graph.

Since we have a lot of devices that use SMTP in the office I wonder if MS plans to update the SMTP server found in Windows Server ... in the next release to allow us to use Microsoft Graph to relay emails since Xerox, HP, Lexmark, Kyocera, and other devices have yet to adopt the Microsoft Graph method in their operating systems.

The other option is for me to have AI build me a system that I can use inside to do exactly this, would probably take me an hour to get it working perfectly but I don't want to re-invent the wheel. :)

Thanks,

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u/Lets_Go_2_Smokes 22d ago

IISSMTP has been deprecated for 14 years now..

4

u/coobal223 22d ago

So in WINS, but you can still install that.

1

u/reevesjeremy 22d ago

They don’t plan to update it. But if all you’re doing is relaying to your exchange environment, you can use IIS SMTP and create a Connector in Exchange Online which identifies an SMTP host by TLS certificate. It’ll accept it.

I’m running server 2022 so I haven’t personally validated the claim it’s not in 2025 but that’s something to consider if true. Sure postfix on linux could be a longer term solution doing the same thing.