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How to check or get to know what all services from M365 tenant are sending emails from the respectiv
How to check or get to know what all services from M365 tenant are sending emails from the respective primary domain attached to tenant?
Also I wanted to bring this into notice and raise an awareness that threat actors are also sending similar kind of emails to people and those emails are not being cought by EOP and MDO and all other strict policies applied via EOP and Defender across M365 tenant and this seems really concerning if those are not cought by specially EOP then it could be harmful and end users may fall for it to delete items and click on malicious links in the phishing emails and get in Identity/credential theft or give unwanted access to attackers.
For example: End user got an email few days back saying that "Your mailbox is almost full" and user need to delete or move some items from inbox and this email was delivered to end users mailbox from the primary domain showing this.
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The link you shared does not answer the question yet. I mean to say the services from M365 tenant like SPO, EXO, ODB and Teams and others.
This email notification was arrived from SharePoint online service to admin mailbox and we wanted to know that all are those services which sends such emails so we are aware and can educate people to know the legitimacy of emails and where they should trust and where not and report such emails to Security team for further checks.
See below snap for clarity .
