How to spot scams like "Closing All Roundcube Version Users Without DNS"

What kind of scam is "Closing All Roundcube Version Users Without DNS"?

Our team has inspected this email and found that it is disguised as an important notification regarding the Roundcube Webmail update. This email is created to trick recipients into clicking the provided link and then disclosing personal information. Emails like this should be ignored to avoid negative outcomes.

More about the "Closing All Roundcube Version Users Without DNS" scam email

This scam email claims that all users of certain Roundcube versions without DNS will have their accounts closed. It urges the recipient to verify their email address to prevent account deactivation. The email mentions improvements, including faster message loading, upgraded search, and new security enhancements.

It warns that unverified accounts may have limited access within 24 hours and provides a link ("Verify Your Account Now" button) for the recipient to "verify" their account. Opening this link leads to a fake Webmail login website where visitors are instructed to enter their email account login credentials.

Any entered information is sent to scammers, who can misuse it for malicious purposes. For example, fraudsters can access emails and harvest personal information, send scam emails (or deliver malware) to others, and try to access other accounts (e.g., social media or banking) using the stolen login details.

They may also sell harvested information (including login credentials) to other cybercriminals. For these reasons, it is important to be careful when receiving such emails to avoid issues like account hijacking, monetary loss, identity theft, or other problems.

Conclusion

This scam attempts to deceive recipients into providing their login credentials by claiming their account is at risk. Information entered on the fake site can be stolen and exploited for fraud, identity theft, or other malicious activities. Users should be cautious with unsolicited emails and ensure they are legitimate before interacting with them.

Some examples of similar scams are "Adobe Acrobat Sign Request", "Review Your Recent Activity", "Salary & Performance Award", and "DocuSign - Project Proposal & Quantity Confirmation". Sometimes, deceptive emails can be used to distribute malware.

How do spam campaigns infect computers?

Malware is often spread through email attachments. Cybercriminals often use infected executable files, Office documents, PDFs, scripts, or compressed files like ZIP or RAR to deliver malware. Opening these attachments or enabling features such as macros can infect a device.

Emails may also include links to fraudulent or compromised websites that either automatically download malware or trick users into downloading and running it. In both cases, malware requires user interaction to infect the system.

How to avoid installation of malware?

Avoid opening files or clicking links in unexpected emails or messages from unknown senders. Exercise caution on risky websites and do not click on pop-ups, links, buttons, or ads on these pages. Keep your operating system and security software up to date, and regularly scan your system for potential threats.

Only download programs from trusted sources, such as official websites or app stores. Do not allow notifications from suspicious sites.

Text presented in the "Closing All Roundcube Version Users Without DNS" email letter:

Subject: Important: Roundcube Webmail Update Required Immediately

ROUNDCUBE WEBMAIL SERVICES

Hello -,

We are closing all Roundcube version users without DNS, Please verify your email address to keep your account from being deactivated.

Recent improvements include:

Faster message loading and performance
Upgraded search functionality
New security enhancements

Verify Your Account Now

For your security, unverified accounts may have limited access after 24 hours.

© 2025 Roundcube Webmail Service. All rights reserved.

Help Center | Privacy Policy

Fake website used to steal login credentials:

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Quick menu:

• What is Closing All Roundcube Version Users Without DNS 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?

Fraudsters usually distribute their scam emails to numerous recipients using email addresses obtained from breaches, fake sites, or other means. These messages are usually not targeted at particular recipients.

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

Update all passwords that may have been compromised immediately. If any banking details, identification information, or other sensitive information is at risk, notify your bank and the appropriate authorities.

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

A computer can be instantly compromised by opening an executable, but malicious documents generally only become a threat when additional steps are taken. The probability of an infection risk varies based on the file type.

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

Simply opening an email does not put a device at risk. Malware can only infect a system if the recipient opens malicious attachments or clicks on unsafe links.

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

Combo Cleaner is capable of eliminating most threats, but a complete scan is advisable to detect deeply embedded malware.