“Messages Are Restrained Due to Low Bandwidth” Email Scam
Written by: Stelian
Published on:
If you have recently received an email claiming that some of your messages are being restrained due to low bandwidth, you might want to think twice before clicking on any links or buttons in it. In this article, we will explain what this email scam is, how it works, how to spot it, and what to do if you have fallen victim to it.
What is the “Messages Are Restrained Due to Low Bandwidth” Email Scam and How Does It Work?
This email scam is a type of phishing attack, which is a fraudulent attempt to obtain sensitive information or data from unsuspecting users by impersonating a legitimate entity or organization. In this case, the scammers pretend to be an email service provider (such as Gmail, Yahoo Mail, Outlook, etc.) and send an email notification to their targets regarding mail delivery status.
The email claims that some of the recipients’ messages are being held back due to low bandwidth and instructs them to take action by clicking on a link or a button that supposedly leads to a page where they can release their messages. However, the link or the button actually redirects them to a fake website that mimics the appearance of a genuine email service provider login page. The fake website then asks them to enter their email address and password, which are then stolen by the scammers.
There are at least two variants of this email scam in the phishing campaign. One of them uses the subject line “Unsuccessful Mail Delivery Report” and the other one uses the subject line “pending messages”. Both of them use similar wording and formatting in the message body and include a link or a button with labels such as “Release Messages”, “Review Here”, or “REVIEW BANDWIDTH”.
Here is how the “Messages Are Restrained Due to Low Bandwidth” email looks like:
Subject: Mail Delivery: Unsuccessful Mail Delivery Report
Notification of pending messages.
Some messages are restrained from delivering due to low bandwidth, we notify you to take prompt actions. Release Messages Review Here
Message should be moved to inbox.
How to Spot the “Messages Are Restrained Due to Low Bandwidth” Email Scam?
There are several signs that can help you identify this email scam and avoid falling for it. Here are some of them:
The sender’s email address does not match the email service provider that you use. For example, if you use Gmail, you should not receive an email from an address like info@outlook.com or support@yahoo.com.
The email contains grammatical errors, spelling mistakes, or unusual formatting. For example, the email might use lowercase letters for proper nouns, misspell words like “bandwidth” or “message”, or use different fonts or colors for different parts of the text.
The email creates a sense of urgency or panic by using phrases like “urgent”, “immediately”, “as soon as possible”, or “before it’s too late”. The scammers use these tactics to pressure you into acting quickly without verifying the authenticity of the email.
The email asks you to click on a link or a button that does not match the domain name of your email service provider. For example, if you use Gmail, you should not click on a link that starts with http://mail.outlook.com or http://yahoo.mail.com. You can check the actual destination of a link by hovering your mouse over it and looking at the bottom left corner of your browser window.
The fake website that you are redirected to does not have a secure connection (HTTPS) or a padlock icon in the address bar. This indicates that the website is not encrypted and your information can be intercepted by third parties.
The fake website does not match the exact design or layout of your email service provider login page. For example, if you use Gmail, you should not see a login page that has a different logo, color scheme, font style, or language than the one you are used to.
What to Do If You Have Fallen Victim to the “Messages Are Restrained Due to Low Bandwidth” Email Scam?
If you have clicked on a link or a button in this email scam and entered your email address and password on the fake website, you should take immediate steps to protect yourself and your accounts from further damage. Here are some of them:
Change your password for your email account as soon as possible. Use a strong and unique password that is different from any other passwords that you use for other accounts or services.
Enable two-factor authentication (2FA) for your email account if possible. This adds an extra layer of security by requiring you to enter a code sent to your phone or another device when logging in from a new device or location.
Check your email settings and look for any changes made by the scammers, such as forwarding rules, signature, recovery options, or contacts. Undo any changes that you did not make yourself.
Scan your computer and devices for malware using a reputable antivirus software. Malware can compromise your system and steal your data or monitor your online activity.
Report the phishing email to your email service provider and delete it from your inbox. You can also report it to authorities such as FTC (Federal Trade Commission) in the US or Action Fraud in the UK.
Monitor your online accounts and financial statements for any suspicious activity or transactions. If you notice anything unusual, contact your bank or service provider immediately and alert them of possible fraud.
Check if you’re device is infected with malware
The “Messages Are Restrained Due to Low Bandwidth” email scam can contain malware within the attachments or links that appear in the body of the email. By interacting with the malware — for example, opening or downloading an attachment that contains a malicious payload — the user may unknowingly infect their device or network, enabling attackers to gain access to protected applications and data.
To check your computer or phone for Trojans, browser hijackers, or other malware and remove them for free, you run a scan with Malwarebytes Free.
Malwarebytes runs on Windows, Mac, and Android. Click the tab below for the device you want to scan, then follow the steps to remove any malware it finds.
Malwarebytes For WindowsMalwarebytes For MacMalwarebytes For Android
Scan Your Computer with Malwarebytes for Windows
Malwarebytes is one of the most popular and trusted anti-malware tools for Windows — and it’s completely free for removing infections. It catches threats that many antivirus programs miss, including adware, browser hijackers, and trojans. Follow the steps below to scan and clean your PC in just a few minutes.
Download Malwarebytes
Click the button below to download the latest version of Malwarebytes for Windows from the official source. The free version is all you need — it will scan your computer and remove adware, browser hijackers, and other malicious software at no cost.
(The link opens in a new page where your download will start)
Install Malwarebytes
When the download finishes, open your Downloads folder and double-click the MBSetup file. If Windows shows a User Account Control pop-up, click “Yes” to allow the installation.
Follow the On-Screen Prompts to Install Malwarebytes
The setup wizard will walk you through a few quick screens:
Choose where you’re installing the program — “Personal Computer” or “Work Computer” — then click Next.
Malwarebytes will now install on your device. This usually takes under a minute.
When installation is complete, the “Welcome to Malwarebytes” screen will open automatically.
On the final screen, click Open Malwarebytes to launch the program.
Enable “Scan for Rootkits”
Before scanning, turn on rootkit detection so Malwarebytes can find even the most hidden threats. Click the Settings gear icon on the left side of the screen.
In the settings menu, find “Scan for rootkits” and click the toggle so it turns blue.
Done? Click “Dashboard” in the left pane to return to the main screen.
Start the Scan
Click the blue Scan button. Malwarebytes will automatically update its virus database and start checking your computer for malware.
Wait for the Scan to Finish
The scan checks your entire system for browser hijackers and other malicious programs, so it can take several minutes. Feel free to do something else — just check back occasionally to see the progress.
Quarantine the Detected Threats
When the scan is done, you’ll see a list of everything Malwarebytes found — malware, adware, and potentially unwanted programs. Click the “Quarantine” button to remove all of them at once.
Malwarebytes will now remove the malicious files and registry entries and move them safely into quarantine.
Restart Your Computer
Some threats can only be fully removed after a reboot. If Malwarebytes asks you to restart, click Yes. Once you’re logged back in, your PC is clean and you can continue with the next steps in this guide.
That’s it — your Windows computer is now free of trojans, adware, browser hijackers, and other malware.
If your current antivirus allowed this malicious program on your computer, you may want to consider purchasing Malwarebytes Premium to protect against these types of threats in the future. If you are still having problems with your computer after completing these instructions, then please follow one of the steps:
Malwarebytes for Mac is a free on-demand scanner that removes the malware other security software tends to miss — adware, browser hijackers, and unwanted programs included. Cleaning an infected Mac with Malwarebytes has always been completely free, and it’s our go-to recommendation. Follow the steps below to scan and clean your Mac in just a few minutes.
Download Malwarebytes for Mac
Click the button below to download the latest version of Malwarebytes for Mac.
When the download finishes, open your Downloads folder and double-click the setup file to begin the installation.
Follow the On-Screen Prompts to Install Malwarebytes
The Malwarebytes for Mac Installer will guide you through a few quick screens. Click “Continue” and keep following the prompts until the installation completes.
When the installation is complete, Malwarebytes opens to the Welcome to Malwarebytes screen. Click “Get started“.
Select “Personal Computer” or “Work Computer”
Malwarebytes will ask what type of computer you’re installing it on. Click either Personal Computer or Work Computer, whichever applies.
Start the Scan
Click the “Scan” button. Malwarebytes will automatically update its detection database and begin checking your Mac for malware.
Wait for the Scan to Finish
Malwarebytes will scan your Mac for adware, browser hijackers, and other malicious programs. This can take a few minutes, so feel free to do something else — just check back occasionally to see the progress.
Quarantine the Detected Threats
When the scan is done, you’ll see a list of everything Malwarebytes found. Click the “Quarantine” button to remove all the threats at once.
Restart Your Mac
Malwarebytes will now remove all the malicious files it found. Some threats can only be fully removed after a reboot — if Malwarebytes asks you to restart, allow it. Once you’re logged back in, your Mac is clean.
That’s it — your Mac is now free of adware, browser hijackers, and other malware.
If your current antivirus allowed a malicious program on your computer, you might want to consider purchasing the full-featured version of Malwarebytes Anti-Malware to protect against these types of threats in the future. If you are still experiencing problems while trying to remove a malicious program from your computer, please ask for help in our Mac Malware Removal Help & Support forum.
Scan Your Phone with Malwarebytes for Android
Malwarebytes for Android automatically detects and removes dangerous threats like malware and ransomware so you don’t have to worry about your most-used device being compromised. Aggressive detection of adware and potentially unwanted programs keeps your Android phone or tablet running smooth.
Download Malwarebytes for Android.
You can download Malwarebytes for Android by clicking the link below.
In the Google Play Store, tap “Install” to install Malwarebytes for Android on your device.
When the installation process has finished, tap “Open” to begin using Malwarebytes for Android. You can also open Malwarebytes by tapping on its icon in your phone menu or home screen.
Follow the on-screen prompts to complete the setup process
When Malwarebytes will open, you will see the Malwarebytes Setup Wizard which will guide you through a series of permissions and other setup options. This is the first of two screens that explain the difference between the Premium and Free versions. Swipe this screen to continue. Tap on “Got it” to proceed to the next step. Malwarebytes for Android will now ask for a set of permissions that are required to scan your device and protect it from malware. Tap on “Give permission” to continue. Tap on “Allow” to permit Malwarebytes to access the files on your phone.
Update database and run a scan with Malwarebytes for Android
You will now be prompted to update the Malwarebytes database and run a full system scan.
Click on “Update database” to update the Malwarebytes for Android definitions to the latest version, then click on “Run full scan” to perform a system scan.
Wait for the Malwarebytes scan to complete.
Malwarebytes will now start scanning your phone for adware and other malicious apps. This process can take a few minutes, so we suggest you do something else and periodically check on the status of the scan to see when it is finished.
Click on “Remove Selected”.
When the scan has been completed, you will be presented with a screen showing the malware infections that Malwarebytes for Android has detected. To remove the malicious apps that Malwarebytes has found, tap on the “Remove Selected” button.
Restart your phone.
Malwarebytes for Android will now remove all the malicious apps that it has found. To complete the malware removal process, Malwarebytes may ask you to restart your device.
That’s it — your Android device is now free of malicious apps, adware, and browser redirects.
If your current antivirus allowed a malicious app on your phone, you may want to consider purchasing the full-featured version of Malwarebytes to protect against these types of threats in the future. If you are still having problems with your phone after completing these instructions, then please follow one of the steps:
Restore your phone to factory settings by going to Settings > General management > Reset > Factory data reset.
The “Messages Are Restrained Due to Low Bandwidth” email scam is a phishing attack that tries to steal your email login credentials by impersonating your email service provider. To avoid falling for this scam, you should always be careful about opening emails from unknown senders, check the sender’s address and the URL of any links in the email, and never enter your login details on any website other than the official one of your email service provider.
10 Rules to Avoid Online Scams
Here are 10 practical safety rules to help you avoid malware, online shopping scams, crypto scams, and other online fraud. Each tip includes a quick “if you already got hit” action.
Stop and verify before you click, log in, download, or pay.
Most scams win by creating urgency. Verify using a trusted method: type the website address yourself, use the official app, or call a known number (not the one in the message).
If you already clicked: close the page, do not enter passwords, and run a malware scan.
Keep your operating system, browser, and apps updated.
Updates patch security holes used by malware and malicious ads. Turn on automatic updates where possible.
If you saw a scary “update now” pop-up: close it and update only through your device settings or the official app store.
Use layered protection: antivirus plus an ad blocker.
Antivirus helps block malware. An ad blocker reduces scam redirects, phishing pages, and malvertising.
If your browser is acting weird: remove unknown extensions, reset the browser, then run a full scan.
Install apps, software, and extensions only from official sources.
Avoid cracked software, “keygens,” and random downloads. During installs, choose Custom/Advanced and decline bundled offers you do not recognize.
If you already installed something suspicious: uninstall it, restart, and scan again.
Treat links and attachments as untrusted by default.
Phishing often impersonates delivery services, banks, and popular brands. If it is unexpected, do not open attachments or log in through the message.
If you entered credentials: change the password immediately and enable 2FA.
Shop safely: research the store, then pay with protection.
Be cautious with brand-new stores, “closing sale” stories, and prices that make no sense. Prefer credit cards or PayPal for dispute options. Avoid wire transfers, gift cards, and crypto payments.
If you already paid: contact your card issuer or PayPal quickly to dispute the transaction.
Crypto rule: never pay a “fee” to withdraw or recover money.
Common patterns include fake profits, then “tax,” “gas,” or “verification” fees. Another is a “recovery agent” who demands upfront crypto.
If you already sent crypto: stop paying, save evidence (wallet addresses, TXIDs, chats), and report the scam to the platform used.
Secure your accounts with unique passwords and 2FA (start with email).
Use a password manager and unique passwords for every account. Enable 2FA using an authenticator app when possible.
If you suspect an account takeover: change passwords, sign out of all devices, and review recent logins and recovery settings.
Back up important files and keep one backup offline.
Backups protect you from ransomware and device failure. Keep at least one backup on an external drive that is not always connected.
If you suspect infection: do not connect backup drives until the system is clean.
If you think you are a victim: stop losses, document evidence, and escalate fast.
Move quickly. Speed matters for disputes, account recovery, and limiting damage.
Stop payments and contact: do not send more money or respond to the scammer.
Call your bank or card issuer: block transactions, replace the card if needed, and start a dispute or chargeback.
Secure your email first: change the email password, enable 2FA, and remove unfamiliar recovery options.
Secure other accounts: change passwords, enable 2FA, and log out of all sessions.
Scan your device: remove suspicious apps or extensions, then run a full malware scan.
Save evidence: screenshots, emails, order pages, tracking pages, wallet addresses, TXIDs, and chat logs.
Report it: to the payment provider, marketplace, social platform, exchange, or wallet service involved.
These rules are intentionally simple. Most online losses happen when decisions are rushed. Slow down, verify independently, and use payment methods and account controls that give you recourse.
About Stelian
Stelian leverages over a decade of cybersecurity expertise to lead malware analysis and removal, uncover scams, and educate people. His experience provides insightful analysis and valuable perspective.
