What kind of email is "Incoming Messages Were Not Delivered"?
Our inspection of the "Incoming Messages Were Not Delivered" email revealed that it is spam. This letter claims that several messages failed to reach the recipient's inbox. This mail targets email passwords, which are extracted through a phishing site disguised as an account sign-in page.
"Incoming Messages Were Not Delivered" email scam overview
The spam email with the subject " Email delivery issue for [recipient's_email_address]" (may vary) states that three incoming messages failed delivery. The recipient is urged to update their email account and retrieve the messages.
As indicated in the introduction, the claims made by this letter are false, and this mail is in no way associated with any legitimate service providers.
After we followed the link presented in this scam email, we were redirected to a phishing website. Pages of this kind are designed to record provided information.
The site in question was disguised as an email account sign-in webpage. If a user attempts to log in through this website, they will inadvertently expose their account to cyber criminals, who may then steal it. Furthermore, the scammers might be able to hijack the content registered through the email.
To elaborate on the potential misuse, criminals can steal the identities of social account owners (e.g., emails, social networking, social media, messengers, etc.) and ask the contacts/friends/followers for loans or donations, promote scams, and proliferate malware by sharing malicious files/links.
Finance-related accounts (e.g., online banking, e-commerce, digital wallets, etc.) can be used to make fraudulent transactions and online purchases.
To summarize, victims of spam emails like "Incoming Messages Were Not Delivered" can experience severe privacy issues, financial losses, and even identity theft.
If you have already entered your log-in credentials into a phishing website – immediately change the passwords of all possibly exposed accounts and inform their official support.
|Name||"Incoming Messages Were Not Delivered" phishing email|
|Threat Type||Phishing, Scam, Social Engineering, Fraud|
|Fake Claim||Several messages failed to be delivered to the recipient's inbox.|
|Symptoms||Unauthorized online purchases, changed online account passwords, identity theft, illegal access of the computer.|
|Distribution methods||Deceptive emails, rogue online pop-up ads, search engine poisoning techniques, misspelled domains.|
|Damage||Loss of sensitive private information, monetary loss, identity theft.|
|Malware Removal (Windows)||
To eliminate possible malware infections, scan your computer with legitimate antivirus software. Our security researchers recommend using Combo Cleaner.
Phishing spam campaign examples
We have examined numerous spam emails; "Product Request", "Release All Of Your Held Messages", "Your Mail Version Is Currently Being Disconnected", and "Signed Agreement" are just a few examples of letters promoting phishing scams.
This mail can target a wide variety of sensitive information; however, the most commonly targeted data includes account log-in credentials, personally identifiable details, and credit card numbers.
Various scams are facilitated through spam mail, and it is also used to distribute malware (e.g., trojans, ransomware, cryptocurrency miners, etc.). Spam messages can be plain or elaborately disguised as notifications/alerts from legitimate service providers, companies, institutions, organizations, authorities, and other entities.
How do spam campaigns infect computers?
Once such a file is opened – the infection chain is triggered. However, some formats may need extra actions to jumpstart malware download/installation processes. For example, Microsoft Office files require users to enable macro commands (i.e., editing/content), while OneNote documents need them to click embedded files or links.
How to avoid installation of malware?
We highly recommend exercising caution with incoming emails, DMs/PMs, SMSes, and other messages. The attachments or links present in dubious/irrelevant mail must not be opened, as they can be virulent.
Another recommendation is to use Microsoft Office versions released after 2010 since they have the "Protected View" mode that prevents automatic macro execution.
It must be mentioned that malware is not proliferated only through spam mail. Therefore, we also advise being vigilant while browsing since fake and malicious online content usually appears genuine and innocuous.
Additionally, all downloads must be performed from official and verified channels. It is just as important to activate and update software using legitimate functions/tools, as illegal activation ("cracking") tools and third-party updaters can contain malware.
We must emphasize that having a dependable anti-virus installed and kept updated is paramount to device and user safety. Security programs must be used to run regular system scans and to remove threats and 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 "Incoming Messages Were Not Delivered" spam email letter:
Subject:  Email delivery issue for ********
 Incoming messages were not delivered to ********
Kindly go HERE to access messages and update your email account's IMAP settings.
******** Email Administrator
Screenshot of the phishing website promoted by the "Incoming Messages Were Not Delivered" spam campaign:
Instant automatic malware removal:
Manual threat removal might be a lengthy and complicated process that requires advanced IT skills. Combo Cleaner is a professional automatic malware removal tool that is recommended to get rid of malware. Download it by clicking the button below:
- What is "Incoming Messages Were Not Delivered" 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:
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.
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 mail is not personal. Cyber criminals distribute it in large-scale operations – therefore, thousands of users receive identical emails.
I have provided my personal information when tricked by this spam email, what should I do?
If you have provided your account credentials – change the passwords of all potentially compromised accounts and inform their official support without delay. And if you have disclosed other private data (e.g., ID card details, credit card numbers, etc.) – immediately contact the appropriate authorities.
I have read a spam email but didn't open the attachment, is my computer infected?
Systems are infected when malicious attachments or links are opened/clicked; merely reading an email will not trigger these processes.
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 – your device was infected. However, you might have avoided this if it was a document (.doc, .xls, .one, .pdf, etc.). These formats may require additional actions (e.g., enabling macro commands, clicking embedded files/links, etc.) to jumpstart malware download/installation chains.
Will Combo Cleaner remove malware infections present in email attachments?
Yes, Combo Cleaner can detect and eliminate practically all known malware infections. It must be stressed that performing a complete system scan is crucial – since sophisticated malicious programs tend to hide deep within systems.