The fake "Microsoft Outlook Mailbox is at Risk" email below is a scam. Therefore, recipients of the same email, which claims their account will expire shortly and they need to upgrade, are asked to delete it. This is because the links in the email go to a phishing website that steals account credentials, which the cybercriminals will use to hijack their potential victims' accounts and use them fraudulently.
The "Microsoft Outlook Mailbox is at Risk" Phishing Scam
From: Outlook Express <mmartin@satel-sa.com>
Date: May 7, 2018 at 7:43:39 AM CDT
Subject: Mailbox is at risk.
Reply-To: <david88666@aol.com>
microsoft ofice outlook
Your mailbox is at risk.
Dear User,
3840MB
4096MB
Current size
Maximum size
Your Account will Expire shortly, If you would like to continue using your Email Address. Click here to re-validate. Upgrade is free.
Thanks,
Mail System Administrator
This notification was sent to %0%; Don't want occasional updates about subscription preferences and friendly suggestions? Change what email update+ sends you. Isp Inc., 1600 Amphitheater Pkwy, Mountain View, CA 94043
This is why Microsoft Outlook users never click on links in emails to sign into their accounts. They should instead, go directly to www.outlook.com and sign-in from there. Once they have signed in, they will be notified of important updates or changes.