We are using Starlink in a remote place, which does not provide a SMTP relay server like our old (slow) cable modem ISP. A family member uses an email service she does not want to move away from that ...
I found a good reference located at https://docs.microsoft.com/en-us/ex...-send-email-using-microsoft-365-or-office-365 I've been using "option 2" for a while now ...