How to avoid falling for scams like "All Incoming Emails Are Blocked"

What kind of scam is "All Incoming Emails Are Blocked"?

Our team has reviewed this email and concluded that it is a phishing scam. This fraudulent message is disguised as a notification from an email service provider regarding email storage. Its purpose is to trick recipients into opening a fake site and entering personal details. Recipients of this email should ignore it.

More about the "All Incoming Emails Are Blocked" scam email

This phishing email has a subject line suggesting a mail delivery failure. It claims that all incoming emails are being blocked. The message urges the recipient to check a storage portal to fix the issue and includes a link/button labeled "Check Storage". Clicking this link opens a fake sign-in website.

On this site, users are requested to provide their passwords. With this information, scammers can try to access email, banking, social media, gaming, or other accounts. If successful, they can use the compromised accounts, depending on their type, to send deceptive messages, carry out fraudulent purchases or transactions, commit identity theft, and engage in other malicious activities.

Moreover, scammers may sell the stolen information on the dark web. Thus, it is important to carefully examine emails before opening included links or disclosing personal information to avoid any of the potential risks.

Similar scam emails in general

In most cases, these deceptive messages are designed to trick recipients into revealing sensitive information, such as passwords or credit card details. They often appear to come from legitimate sources (e.g., email service providers) and use urgent language to encourage quick action. Falling for these scams can lead to account compromise or even malware infections.

More examples of scam emails are "Virus Intrusion Into Our Office 365 Webmail Server Scam", "Webmail System Maintenance", and "Account Password Is Old".

How do spam campaigns infect computers?

Cybercriminals spread malware through emails by including malicious attachments or links. These attachments may appear as normal files like documents, ZIP folders, or executables, but opening them or enabling features like macros (in documents) can activate the malware and infect computers.

When fraudulent emails contain links, these links can lead to fake or compromised websites. Visiting these sites may lead to harmful software being downloaded, sometimes automatically, without any further action from the user.

How to avoid installation of malware?

Be careful with emails or messages that look irrelevant or unexpected, especially if they are from unknown senders and include links or attachments. Avoid pirated software or tools that are supposed to bypass software activation. Keep your operating system and apps up to date.

Download files and programs only from trusted sources or official app stores. Additionally, avoid interacting with ads, pop-ups, buttons, etc., on suspicious websites, and never allow such sites to send notifications. Using a reliable antivirus program and running system scans regularly is also advisable. If you have already opened malicious attachments, we recommend running a scan with Combo Cleaner Antivirus for Windows to automatically eliminate infiltrated malware.

Text presented in the "All Incoming Emails Are Blocked" email letter:

Subject: [********]:Mail Delivery Fail!

All incoming emails are blocked !
********
All incoming emails are blocked from delivering to ******** check storage portal below to fix the error.
Check Storage

To secure mailbox visit
********
© ******** 2025

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Quick menu:

• What is All Incoming Emails Are Blocked 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?

Scam emails are usually sent in bulk and not aimed at specific individuals. They often contain generic messages and are sent to addresses collected through data breaches, fake registration forms, or other untrustworthy sources.

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

If login credentials were shared with scammers, it is essential to change the passwords for those accounts (and do so as soon as possible). Any other accounts that use the same or similar passwords should also be updated to prevent unauthorized access.

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

Opening a malicious executable file can lead to immediate system infection. While other file types are safer, they can still be used to spread malware, especially if users are tricked into performing extra steps, like enabling macros in harmful documents.

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

Simply opening or reading an email is not harfil, as most malware requires the user to take further action to infiltrate systems.

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

Combo Cleaner can detect and remove most known malware, but some threats may be more deeply hidden. To ensure complete removal, it is important to run a full system scan.