Forum Discussion
Exchange Online - Mail User - without license and how to send email / SMTP access
Hi, tenant has E3 subscription and uses Exchange Online. We want to create external "mail contact" who can send emails through SMTP. So we created Exchange Online > Mail user. User can normally lo...
cname is not ok, because of server certificates / ssl / tls..., so better use original server name.
Also, if you have dynamic public ip address, then this method is not possible.
It is better that Exchange team implement new functionality, something like Exchange Online - Application user, which will have username/password for SMTP submission, and will not require a license.
Yes, you are right again, cname has indeed drawback that the certificate does not match the name. I've chosen nonetheless for cname to make it easier to switch. TLS is not so strict currently in our nodes. But it is indeed not the right approach for optimal security.
It is possible to send for free, through Azure AD App and using Microsoft Graph API ...
