How to identify scam emails like "You Have Exhausted All Of Your Available Email Storage"

What kind of email is "You Have Exhausted All Of Your Available Email Storage"?

After reviewing this "You Have Exhausted All Of Your Available Email Storage" message, we determined that it is fake. This spam email recommends that the recipient submit a request for more mailbox storage space. This campaign's goal is to deceive recipients into disclosing their email account log-in credentials to a phishing website.

"You Have Exhausted All Of Your Available Email Storage" email scam overview

This spam email claims that the recipient has reached the limit for their mailbox storage. The message advises submitting a request to the admin for a business email plan upgrade in order to receive an additional 10 GB of storage. It must be emphasized that the information in this email is false, and this mail is not associated with any genuine service providers.

Pressing the "UPGRADE NOW" button results in a redirect to a phishing site that imitates the recipient's email sign-in page. Phishing websites operate by recording provided information and sending it to scammers.

Cyber criminals target email accounts, as they tend to contain incredibly sensitive information and may even open a gateway to hijacking linked accounts, platforms, and services. Hijacked work accounts might be used to infect the corporate network with trojans, ransomware, and other malware.

To expand upon how scammers can abuse unauthorized access, they may steal the account (e.g., email, social networking/media, messenger, chat, etc.) owner's identity and request loans or donations from contacts/friends/followers, promote scams, and spread malware by sharing malicious files/links. Stolen finance-related accounts (e.g., e-commerce, money transferring, online banking, digital wallets, etc.) can be used to make fraudulent transactions or online purchases.

In summary, victims of scam emails like "You Have Exhausted All Of Your Available Email Storage" can experience system infections, serious privacy issues, financial losses, and even identity theft.

If you have already provided your log-in credentials to a phishing site/file – change the passwords of all potentially compromised accounts and contact their official support without delay.

Phishing spam campaign examples

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In addition to log-in credentials, these messages commonly target personally identifiable information and finance-related data. However, various scams are promoted through spam campaigns, and they are used in malware distribution.

Due to how widespread spam mail is and how well-crafted it can be – we highly recommend vigilance with incoming emails, DMs/PMs, SMSes, and other messages.

How do spam campaigns infect computers?

Spam campaigns are often used in malware proliferation. These deceptive emails include malicious files as attachments or download links. Infectious files come in different formats, e.g., archives (ZIP, RAR, etc.), executables (EXE, RUN, etc.), documents (PDF, Microsoft Office, Microsoft OneNote, etc.), JavaScript, and so on.

Merely opening such a file can be enough to trigger the infection chain. However, some formats require additional actions to initiate malware download/installation. For example, Microsoft Office files need users to enable macro commands (i.e., content/editing), while OneNote documents require them to click on embedded links or files.

How to avoid installation of malware?

We highly recommend exercising caution within incoming emails and other messages. Attachments or links present in suspicious communications must not be opened, as they can be harmful or infectious.

However, malware is not distributed exclusively via spam campaigns. Therefore, we advise exercising caution when browsing since fake and malicious online content usually appears genuine and harmless.

Another recommendation is to download only from official and trustworthy sources. Additionally, all programs must be activated and updated using functions/tools provided by legitimate developers, as illegal product activation ("cracking") tools and third-party updaters may contain malware.

We must stress the importance of having a reputable antivirus installed and kept updated. This software must be used to perform regular system scans and to remove detected threats/issues. If you've already opened malicious attachments, we recommend running a scan with Combo Cleaner Antivirus for Windows to automatically eliminate infiltrated malware.

Text presented in the "You Have Exhausted All Of Your Available Email Storage" spam email letter:

Subject: You have exhausted all of your available email storage.

EMAIL UPDATE

You have exhausted all of your available email storage.
Request you upgrade your email

Please request your email admin to upgrade your domain email plan to Business Email and get 10 GB storage for all your mailboxes.
You must contact your admin immediately to upgrade your domain to Business Email plan to get 10 GB storage for all mailboxes.

UPGRADE NOW

(C) 2025

Screenshot of the phishing website promoted by this spam campaign:

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Quick menu:

• What is "You Have Exhausted All Of Your Available Email Storage" phishing email?
• 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?

Spam emails are not personal, even if they include information relevant to the recipients. These messages are distributed in large-scale campaigns – hence, thousands of users receive identical (or incredibly similar) emails.

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

If you have provided your log-in credentials – change the passwords of all possibly exposed accounts and inform their official support. However, if the disclosed information was of a different personal nature (e.g., passport scans/photos, ID card details, credit card numbers, etc.) – immediately contact relevant authorities.

I have read a spam email but didn't open the attachment, is my computer infected?

No, merely reading an email does not pose an infection threat. Systems are compromised when malicious attachments or links are opened/clicked.

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

If the opened file was an executable (.exe, .run, etc.) – most likely, yes – the device was infected. However, you might have avoided this if it was a document (.doc, .xls, .pdf, .one, etc.). These formats may need extra interaction (e.g., enabling macros, clicking embedded files/links, etc.) to initiate malware infiltration.

Will Combo Cleaner remove malware infections present in email attachments?

Yes, Combo Cleaner can detect and remove practically all known malware infections. Remember that performing a complete system scan is paramount since sophisticated malicious software tends to hide deep within systems.