What sort of email scam is "Mailbox Storage & Security Check"

What kind of email is "Mailbox Storage & Security Check"?

We have inspected this email and determined that it is a phishing scam. The message poses as a routine IT department notice about mailbox storage and security maintenance. It aims to trick recipients into entering their email credentials on a fraudulent login page. This email should be ignored.

"Mailbox Storage & Security Check" email scam overview

The email arrives with the subject "Storage & Security Check" and claims to be sent by an IT and Systems team on behalf of a company. It instructs the recipient to clear their spam and trash folders, delete large attachments, and click a link to review mailbox settings in a supposed company portal. A fake Message ID and a "TLS • Secure" label are displayed to make the email appear credible.

Clicking the link takes the victim to a page hosted at ndptech[.]cam. The page shows a form titled "Email Login" asking for an email address and a password. A "Secure login session" checkbox and a "Forgot password?" link are present as well, mimicking the look of a real webmail portal.

Any credentials entered on that form are sent directly to the scammers. A hijacked email account can be exploited in many ways: reading private messages, launching follow-up phishing attacks from a trusted address, accessing other services tied to that email, or selling the credentials to other criminals.

Ndptech[.]cam is not connected to any legitimate IT service provider. Any companies or organizations whose names appear in emails like this one are not involved in the scam in any way.

Email scams in general

This email is a phishing scam disguised as a routine IT maintenance notice. Its goal is to redirect recipients to a fake login page and collect their email credentials. Anyone who receives this message should ignore it and delete it without clicking any links. Note that campaigns like this are also sometimes used to distribute malware.

More examples of phishing emails that use a similar approach are We Have Processed Your Payment, Outstanding Invoice, and Order Specification, Presentation & Drawing.

How do spam campaigns infect computers?

Threat actors frequently use email to spread malware by attaching malicious files to messages. These can take many forms, including executable programs, Microsoft Office documents, ZIP or RAR archives, PDFs, and script files. Opening such files - or enabling features like malicious macro commands - can allow malware to run on the device.

Emails may also contain links pointing to malicious websites. Visiting these sites can result in automatic downloads of harmful software, or prompt the user to manually run a malicious file. In most cases, some form of user interaction is needed before a system is compromised.

How to avoid installation of malware?

Approach unexpected emails with caution, especially those that urge immediate action or contain attachments and links. Do not open files or click links in messages from unknown or unverified senders. If an email claims to come from a known organization, confirm the request through that organization's official website or support channels before taking any action.

Download software only from official websites and authorized app stores. Avoid pirated software, cracking tools, and key generators, as these are a frequent source of malware. Keeping the operating system and all applications up to date helps close security gaps that attackers might otherwise exploit.

Run a reputable anti-malware program and keep its definitions current. Be cautious about granting websites permission to show browser notifications. If you have already interacted with a suspicious attachment or link, run a scan with Combo Cleaner Antivirus for Windows to identify and remove any threats.

Text presented in the "Mailbox Storage & Security Check" email letter:

Subject: Storage & Security Check

— Mailbox Maintenance
Message ID: IT-211025 | Sent by solpetroleum.co.ao IT & Systems
Action recommended: mailbox storage & security check

Hi ********,
Reminder: To keep your mailbox running reliably, please review storage and remove unneeded messages (spam, large attachments, or old archived messages).

As part of routine maintenance, we recommend you perform the following:

Clear messages from Spam and Trash folders.
Delete or archive large attachments you no longer need.
Confirm your mailbox activity and settings via the secure link below.

[Review mailbox in company portal] TLS • Secure

If you did not request this or you notice suspicious activity, please contact the IT Help Desk immediately at ********.

Thanks,
******** IT & Systems Team
© 2026 ******** — System Notification | Message ID: IT-211025

A fake email login page used in this scam:

Instant automatic malware removal:

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Quick menu:

• What is Mailbox Storage & Security Check phishing scam?
• Types of malicious emails.
• How to spot a malicious email?
• What to do if you fell for an email scam?

Types of malicious emails:

Phishing Emails

Most commonly, cybercriminals use deceptive emails to trick Internet users into giving away their sensitive private information, for example, login information for various online services, email accounts, or online banking information.

Such attacks are called phishing. In a phishing attack, cybercriminals usually send an email message with some popular service logo (for example, Microsoft, DHL, Amazon, Netflix), create urgency (wrong shipping address, expired password, etc.), and place a link which they hope their potential victims will click on.

After clicking the link presented in such email message, victims are redirected to a fake website that looks identical or extremely similar to the original one. Victims are then asked to enter their password, credit card details, or some other information that gets stolen by cybercriminals.

Emails with Malicious Attachments

Another popular attack vector is email spam with malicious attachments that infect users' computers with malware. Malicious attachments usually carry trojans that are capable of stealing passwords, banking information, and other sensitive information.

In such attacks, cybercriminals' main goal is to trick their potential victims into opening an infected email attachment. To achieve this goal, email messages usually talk about recently received invoices, faxes, or voice messages.

If a potential victim falls for the lure and opens the attachment, their computers get infected, and cybercriminals can collect a lot of sensitive information.

While it's a more complicated method to steal personal information (spam filters and antivirus programs usually detect such attempts), if successful, cybercriminals can get a much wider array of data and can collect information for a long period of time.

Sextortion Emails

This is a type of phishing. In this case, users receive an email claiming that a cybercriminal could access the webcam of the potential victim and has a video recording of one's masturbation.

To get rid of the video, victims are asked to pay a ransom (usually using Bitcoin or another cryptocurrency). Nevertheless, all of these claims are false - users who receive such emails should ignore and delete them.

How to spot a malicious email?

While cyber criminals try to make their lure emails look trustworthy, here are some things that you should look for when trying to spot a phishing email:

• Check the sender's ("from") email address: Hover your mouse over the "from" address and check if it's legitimate. For example, if you received an email from Microsoft, be sure to check if the email address is @microsoft.com and not something suspicious like @m1crosoft.com, @microsfot.com, @account-security-noreply.com, etc.
• Check for generic greetings: If the greeting in the email is "Dear user", "Dear @youremail.com", "Dear valued customer", this should raise suspiciousness. Most commonly, companies call you by your name. Lack of this information could signal a phishing attempt.
• Check the links in the email: Hover your mouse over the link presented in the email, if the link that appears seems suspicious, don't click it. For example, if you received an email from Microsoft and the link in the email shows that it will go to firebasestorage.googleapis.com/v0... you shouldn't trust it. It's best not to click any links in the emails but to visit the company website that sent you the email in the first place.
• Don't blindly trust email attachments: Most commonly, legitimate companies will ask you to log in to their website and to view any documents there; if you received an email with an attachment, it's a good idea to scan it with an antivirus application. Infected email attachments are a common attack vector used by cybercriminals.

To minimise the risk of opening phishing and malicious emails we recommend using Combo Cleaner Antivirus for Windows. 

Example of a spam email:

What to do if you fell for an email scam?

• If you clicked on a link in a phishing email and entered your password - be sure to change your password as soon as possible. Usually, cybercriminals collect stolen credentials and then sell them to other groups that use them for malicious purposes. If you change your password in a timely manner, there's a chance that criminals won't have enough time to do any damage.
• If you entered your credit card information - contact your bank as soon as possible and explain the situation. There's a good chance that you will need to cancel your compromised credit card and get a new one.
• If you see any signs of identity theft - you should immediately contact the Federal Trade Commission. This institution will collect information about your situation and create a personal recovery plan.
• If you opened a malicious attachment - your computer is probably infected, you should scan it with a reputable antivirus application. For this purpose, we recommend using  Combo Cleaner Antivirus for Windows.
• Help other Internet users - report phishing emails to Anti-Phishing Working Group, FBI’s Internet Crime Complaint Center, National Fraud Information Center and U.S. Department of Justice.

Frequently Asked Questions (FAQ)

Why did I receive this email?

These messages are not directed at specific individuals. Scammers send them to large groups of people at once, using addresses gathered from data breaches, fake websites, and other similar sources.

I have provided my personal information when tricked by this email, what should I do?

Change the password for your email account immediately. Also update credentials for any other accounts that share the same password, or that could be accessed through the compromised email address.

If other sensitive information was disclosed - such as banking details or identity documents - contact the relevant institution or authority without delay.

I have downloaded and opened a malicious file attached to an email, is my computer infected?

It depends on the file type. Executable files tend to launch malicious code as soon as they are opened. Documents and archives usually require an additional step from the user - such as enabling macros or running an embedded installer - before any infection takes hold.

I have read the email but did not open the attachment, is my computer infected?

No. Simply reading or viewing an email does not cause an infection. A system is only put at risk when the user clicks a link, opens a file, or otherwise interacts with harmful content inside the message.

Will Combo Cleaner remove malware infections that were present in email attachment?

Combo Cleaner can detect and remove most known malware. For best results, run a full system scan - some advanced threats are designed to hide deep within the system and may only be found through a thorough scan.