Timestamp in Received email header and on Outlook screen different for emails from single sender.

Question

Our users, customers, and vendors receive emails from our ERP system (it uses Courier Email product to send emails). The time shown on the emails in Outlook has recently changed. For example, an email is sent at 10:48 AM, it arrives almost immediately in our Outlook Inbox, the time shown is 05:48 AM.

Looking at the headers for the email, the latest Received entry (at the top) shows Received: by [Moderator note: personal info removed] with SMTP id [Moderator note: personal info removed]; Tue, 24 Feb 2026 07:48:25 -0800 (PST)

Looking at the Date entry (at the bottom of the headers), it shows Date: Tue, 24 Feb 2026 10:48:23 -05:00

I have checked the Date/Time settings on my Windows PC and on our Google Workspace configuration - they are both correct, showing the accurate time and our Eastern Time timezone. The DST setting is also turned on. Talking with our ERP provider, they assure me that the configuration there is also correct.

Another anomaly is that if I look at the email with another client (Gmail, AOL mail, etc. on the web or in a mobile app) the time looks fine (10:48 AM). I have examples of the header information and and an image of the web app with the correct time, if you need them.

Please help me figure out what I need to do to fix this problem with Outlook.

Thank you,

[Moderator note: personal info removed]

Answer 1

As this forum is a public platform, we’ve taken steps to help protect your privacy by removing your organization’s domain name from your message. To ensure your data remains secure, we kindly recommend avoiding the inclusion of personal or organizational details such as domain names or screenshots with sensitive information in future posts.  

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Hi @Bill James, 

Thank you for reaching out to the Microsoft Q&A forum and for clearly outlining your concern. 

Based on the details you shared, I understand that in classic Outlook the time shown for emails from your ERP sender is consistently offset (for example, a message sent at 10:48 AM displays as 05:48 AM), even though the message headers and other mail clients show the expected time. I truly understand and appreciate your effort in validating Windows and Google Workspace time zone and DST settings, and in capturing the header values for comparison. 

This difference can occur because Outlook may display a timestamp based on a specific Received hop recorded in the message headers, which can be stamped in a different time zone than the Date header. In your sample, the latest Received entry is stamped in PST while the Date header is stamped in Eastern Time, and Outlook then converts the value using the time zone it believes is active for your profile. 

Below are some alternative steps designed to address your situation effectively: 

1/ Confirm the time zone Outlook is using in classic Outlook  

• Open Outlook, select File, then select Options. 
• Select Calendar, then locate the Time zones section. 
• Confirm the Time zone is set to Eastern Time, select OK, and then restart Outlook. 

2/ Validate the mailbox time zone in Outlook on the web  

• Sign in to Outlook on the web. 
• Select Settings, then select Calendar, then select View. 
• Under Time zones, confirm the display time zone is set to Eastern Time, and then save the change. 

3/ Refresh the Outlook profile to clear any cached time zone mapping  

• Close Outlook. 
• Open Control Panel, select Mail, then select Show Profiles. 
• Select Add to create a new profile, add the same mailbox, set the new profile as default, and then test a new message from the same ERP sender. 

4/ Contact IT administrator:  

Since your account is managed by your organization, please contact your IT administrator to review your permissions and policies. If the issue persists after these checks, ask your IT administrator to submit a support request directly to Microsoft Support team.       

They can raise a support ticket by visiting: Get support - Microsoft 365 admin | Microsoft Learn 

As community moderators, we appreciate your understanding that our access to internal development details is limited. Our primary role is to guide users toward the appropriate resources and support channels. While we may not have visibility into deeper backend analysis, we’ll continue doing our best to support you within the scope of our responsibilities.     

I hope this information is helpful. Please follow these steps and let me know if it works for you. If you have any updates regarding the issue, please feel free to share them with me.       

Thank you for your patience and your understanding. I look forward to continuing the conversation.  

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Answer 2

The issue you are experiencing with the timestamp discrepancies in Outlook could be related to how Outlook handles time zones and daylight saving time (DST). Here are a few points to consider:

1. Time Zone Settings: Ensure that the time zone settings in Outlook are correctly configured to match your local time zone. Since you mentioned that the settings on your Windows PC and Google Workspace are correct, double-check the time zone settings specifically in Outlook as well.
2. Daylight Saving Time: Since you have confirmed that the DST setting is turned on, verify that the time zone you are using in Outlook is one that observes DST correctly. If the server sending the emails is in a different time zone or does not observe DST, it could lead to discrepancies in the timestamps.
3. Email Headers: The email headers you provided show that the email was received at 07:48:25 -0800 (PST) while the date indicates it was sent at 10:48:23 -05:00. This suggests that there is a time zone difference between the sender's server and your Outlook settings. The timestamps in the headers reflect the time zone of the server rather than your local settings.
4. Different Clients: The fact that other email clients (like Gmail or AOL) display the correct time indicates that those clients might be interpreting the time zone information differently or adjusting for the time zone settings more accurately than Outlook does.

To resolve this issue, you may want to:

• Adjust the time zone settings in Outlook to ensure they align with your local time zone and DST settings.
• If the problem persists, consider reaching out to Microsoft support for further assistance, as there may be specific configurations or updates needed for Outlook to handle these timestamps correctly.

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References:

• Read receipt from a Microsoft 365 recipient displays incorrect time zone information
• Incorrect search results when using a date filter in the Outlook search bar