Update 11/13/2023: We added new information on how to know when this change is released to your organization.
Today, we are announcing an update to our requirements for SMTP relay through Exchange ...
Updated Feb 22, 2024
Version 19.0
Blog Post
Hi,
The Email from Exchange server is forwarded to our SMPT server and we relay back to Exchange Online server, which takes care of the delivery.
We are using the following type of connector to achieve this-
1)Office 365 to Your Partner Org
2)Your Org email server to Office 365.
In this case:
- SMTP certificate domain on the SMTP connection; or
- SMTP envelope sender domain in the MAIL FROM command (P1 sender domain).
1 a) cannot be satisfied in our scenaroio So we are relying on 1 b).
When email reached us, we issue the same "mail from" command as what is in the original "mail from" command(from exchange).
In some cases, mails reaching our server come with an empty return path, ie., "mail from" from exchange has an empty value. Hence the "mail from" command issued by us is also having an empty value.
In this cases will the mail delivery be impacted?