Can we use MS Graph SendMail functionality to send email through an unlicensed account

Question

We're building an application to send automated emails to alert our clients about time sensitive information. Until now, we have had success sending emails using the sendMail functionality of the API with out licensed accounts. For example, my own account that I am using to write this question. But, we're having trouble using a unlicensed account like alerts@comanyname.com to do this. When I use this account that no subscriptions like Office 365 or anything at all, I get a resource error. My question is, can we use an unlicensed account to do send emails or do we need a licensed account. If we do need a license, what license would be the cheapest option as this account (address) is only meant for sending emails.

Answer 1

Hi Ibrahim,

Good afternoon and thank you for your question. As far as I can tell, you will need to have a license or a subscription and the minimum/cheapest option that I can think of is Exchange Online Plan 1.

Reference: https://www.microsoft.com/en-us/microsoft-365/exchange/compare-microsoft-exchange-online-plans

Have you tried using Shared Mailbox if it works?

https://learn.microsoft.com/en-us/graph/outlook-send-mail-from-other-user?source=recommendations