Sending, receiving, and organizing email in Outlook on the web for business
Hi Lisa,
Thank you for connecting with us in Microsoft community.
Before moving forward, could you please allow me to collect below information from your side to narrow down the situation?
According to your description for "Unverified Sender"
The warning message you are seeing in Outlook about an "Unverified sender" is a security feature designed to protect users from potential phishing or spoofing attempts. This warning is triggered when the sender's email address cannot be verified through authentication mechanisms like SPF, DKIM, or DMARC.
You may need to refer this detailed official document to get understanding: Email authentication in Microsoft 365 - Microsoft Defender for Office 365 | Microsoft Learn
While it may be frustrating to see this warning for legitimate senders, it is important to prioritize email security and caution when interacting with emails that may pose a risk. The "Delete" option is provided as a precautionary measure to prevent users from engaging with potentially harmful emails.
If you believe that a sender flagged as "unverified" is legitimate, you can try to check the following steps:
- Contact your IT administrator: If you are part of an organization and if you are an End user, you may need to reach out Office 365 global admin or IT department in your organization to review the email authentication settings and potentially whitelist the sender's domain. Create safe sender lists - Microsoft Defender for Office 365 | Microsoft Learn
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Furthermore, if you are still facing this situation after performing above steps, your certain part of scenario should be diagnosed by Microsoft's backend side support team by collecting some more advanced logs information from Office 365 global admin person via remote session. Frontline technical support engineer can also involve specific support team for further investigation about some particular situation if it is required. After diagnosing the scenario, our technical support team can provide possible information from their end.
If there are any known issues, this information can be provided by the technical support engineer from their backend resources.
Since we forum moderators have limited permissions and access resources, due to this reason, we are unable to connect Microsoft frontline support team from this public community for further diagnosis.
For the above provided standard process information, in your organization, Office 365 global admin person may need to contact Office 365 support team on backend via an open service request so they can diagnose this specific scenario through some more technical resources,
For this standard process, here's the official document for the global admin reference: Get support - Microsoft 365 admin | Microsoft Learn****(Online Option).
Note: End-user person may need to contact the Office 365 global admin person in your business organization for connecting with technical support engineer for further process.
Important note: If any organization's Office 365 Business/Business/Education subscription is from a syndicated partner or reseller, and if the global admin can't open the service request on their end, they may need to contact the reseller's support provider so they can help the global admin to open the service request on their end. after the Office 365 support team will involve in the created service request.
I hope I have provided all the required process information and direction for your current situation.
Your cooperation precious time is highly appreciated.
Sincerely
Vaidya Darpan