A program that grants points for using Bing search, which users can redeem for gift cards, sweepstakes entries, or charitable donations.
Treat that message as suspicious.
The sender domain customeremail.microsoftrewards.com is not listed among the Microsoft support domains documented for genuine Microsoft support email. For Rewards-related mail in the provided material, one accepted Microsoft Q&A example confirms customermail.microsoft.com with a rewards.bing.com sweepstakes link as genuine, but there is no support here for customeremail.microsoftrewards.com.
Since the link opened the Bing Rewards page, the safest next steps are:
- Do not click that email again and do not open any attachments from it.
- Check the sender carefully in Outlook. Suspicious signs include:
- a
?on the sender image - a
viatag - a sender address that differs from the visible From address
- a
- Inspect the message for phishing signs such as urgency, unexpected rewards, or anything asking for credentials.
- Secure accounts that use that email address:
- confirm a strong, unique password is in use
- turn on multi-factor authentication if it is not already enabled
- change any password that is weak or reused on multiple sites
- Report or mark the message as phishing/junk in Outlook to help tune filtering.
- Be alert for follow-up messages asking to click links, open attachments, or call a number.
- If credentials were entered after clicking, immediately change the password for that account and review account security.
If Outlook shows a red safety bar, delete the message. If it shows a yellow safety bar, do not download attachments or click links unless the sender is verified.
References:
- How to determine if an email from Microsoft support is genuine
- Phishing and suspicious behavior in Outlook | Microsoft Support
- What to do if your email address is leaked | Microsoft Support
- Help protect your Outlook.com email account | Microsoft Support
- Is this email and link I got from ******@customermail.microsoft.com legit? - Microsoft Q&A