How to Set Up an Office 365 SMTP Relay

This article has not been completed yet. However, it may already contain helpful Information and therefore it has been published at this stage.

Prerequisites:

• an Office 365 Subscription. If you do not have this yet, you can Sign up for an Office 365 E5 trial subscription.
• a Mailbox + Credentials

Setting Up the SMTP Relay

# Check if SMTP is installed before installing it.
 $smtp = get-WindowsFeature "smtp-server"
 if(!$smtp.Installed){
 write-host "SMTP is not installed, installing it..." -ForegroundColor red
 add-WindowsFeature $smtp
 }
else{
 write-host "SMTP is already installed!" -ForegroundColor Cyan
 }

Sources:

https://lexisnexis.custhelp.com/app/answers/answer_view/a_id/1101986/~/install-and-configure-an-smtp-relay-for-office-365-exchange-online

https://it-infrastructure.solutions/docker-office-365-mail-relay/