How to Block Spam Emails? [2023 Ultimate Guide]

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Harsha Kiran
Written by
Harsha Kiran

Updated · Oct 25, 2023

Harsha Kiran
Founder | Joined March 2023 | LinkedIn
Harsha Kiran

Harsha Kiran is the founder and innovator of He started it as a personal passion proje... | See full bio

Lorie Tonogbanua
Edited by
Lorie Tonogbanua


Lorie Tonogbanua
Joined June 2023 | LinkedIn
Lorie Tonogbanua

Lorie is an English Language and Literature graduate passionate about writing, research, and learnin... | See full bio

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Fortunately, email services have default blockers on their system. For example, AI filters empower Gmail to block nearly 100 million spam messages daily. 

However, as blockers develop, so are the ways of spamming. The 2021 email compromise that blew an $8.12 million loss is a reminder of how cunning spam emails are getting. 

Stop spam emails and outsmart them across different platforms using the tips and tricks in this article. Dive in!

Spam Emails: How to Block Them? 

The world-renowned tech company, Cisco, defines spam emails as: 

“[...] unsolicited emails sent in bulk. Spam is usually associated with risky business schemes, offensive messages, and chain letters.”

However, not all bulk messages are spam—especially permission-based ones. 

Spams are rarely direct emails from advertisers. They're usually from a spamming party bound by a deal between them and the legit advertiser. 

Also, there are many ways spammers find your email address. They can buy your email address or collect them from brands or programs.

Learning how to block spam mail is the best way to prevent spammers from reaching you again. 

Stopping Spam Emails on Gmail

With over 1.8 billion people using Gmail, it is today's leading email platform. This means that it also receives most spam emails from scammers and attackers.

Use these methods to permanently stop spam from lurking in your Gmail account. 


Method 1: Reporting the Message as Spam

You can report messages as spam through a Gmail web browser or the Gmail app on your mobile device. Here's how:

Using Web Browser

  1. Open the message you think is spam. 
  2. Click the Report Spam icon at the message's top left.

Sample email on Gmail3. Gmail will block those messages from your account. 

Using the Gmail App

1. Open the spam email.

2. Click the three dots at the top-right corner of your phone's screen. 

 Configuring an Email on the Gmail App

3. You will see a drop-down list. Click Report Spam

Method 2: Blocking the Sender

If reporting the message as spam does not work, you can block the sender. Here is a quick way to block a particular sender on Gmail:

Through Your Browser

  1. Click the spam email. 
  2. Tap the three dots right corner of the message. 
  3. Select the Block "(sender name)" button.

Blocking an email sender on Gmail

Through the Gmail Mobile App

  1. Open the spam on your Gmail app. 
  2. Click the three dots. 
  3. Select Block "(sender)."

Blocking a user on Gmail using the mobile app

Method 3: Unsubscribing From Mailing Lists

Unsubscribe links or buttons are often at the bottom of the email on both Gmail desktop and mobile. Here's an example:

Unsubscribe button on Gmail

✅ Pro Tip

Some emails make it hard for users to find the link to unsubscribe. Others give no unsubscribe option at all. 

If this happens, try visiting the site to see if they have the email subscription settings. Do this with caution to avoid going to a fake site and clicking a sketchy link. 

Method 4: Filtering Emails

Gmail offers a spam filtering feature. It lets you categorize emails based on your preference. Here's how you can set it up:

  1. Open the message you think is spam. 
  2. Click the three-dot menu and choose "Filter messages like this." Gmail will redirect you to a search pop-up.  

Gmail’s Email Settings

  1. From the list, determine what to do with the emails by clicking the Create filter button. 


✅ Pro Tip

The Gmail mobile app does not offer this customization feature. Use your laptop or PC to set up spam filtering and sync your devices. 

Deterring Spam and Junk Emails on Yahoo Mail

One of the pioneering email platforms, Yahoo Mail has 227.8 million active users. It is the go-to email service for the older generations aged 65 and up. 

Here are the effective ways to prevent spam messages from cluttering your Yahoo Mail:


Method 1: Blocking Spam Yahoo Messages

Follow the steps to block spam messages in Yahoo Mail on the web browser and Yahoo app. 

Yahoo Mail on Browser

  1. Log in to your account. 
  2. Click the gear icon at the far right of your inbox's homepage.
  3. Select More Settings.


  1. Select the Security and Privacy menu. You'll see a section labeled Blocked addresses
  2. Click the Add button and enter the email addresses you want to block. Press Save

Yahoo Mail Settings

📝 Note

There is no blocking option in Yahoo mobile yet. However, marking a message as spam delivers the same effect.

Method 2: Marking Suspicious Messages as Spam

Yahoo Mail can mark individual senders and group messages as spam on the web and mobile. Keep reading to know how.

Yahoo Mail on Browser

  1. Log in to Yahoo Mail.
  2. Select the messages you consider spam by checking the box on the left. 
  3. After marking the messages, click the Spam button on the upper right. 


Yahoo Mail Mobile App

  1. Launch the app. 
  2. Mark messages as spam by tapping the empty checkboxes on the left side of each email. 
  3. Tap More in the toolbar at the screen's bottom. 
  4. Select Mark as spam


Once you’re done, all the marked messages will be moved to your Spam folder.

Method 3: Unsubscribing from Spam messages

Yahoo webmail and mobile unsubscribe from spam messages differently. Here's how to do it on both platforms:

For Yahoo Webmail

  1. Log in to your account.
  2. Select messages you think are junk by checking the empty boxes on the far left of each message. 
  3. Click the three dots next to the Spam icon and select Unsubscribe from the drop-down menu.


  1. A dialog box will appear. Click Unsubscribe to finalize the process. 

For the Yahoo Mobile Application

  1. Open your Yahoo Mail app. 
  2. Tap the message you think is spam. 
  3. Click More (with three dots) and tap Unsubscribe.


  1. This message will appear to confirm your success. It should say: "Unsubscribe Request Sent."

Blocking Unwanted Emails on Outlook

The email-blocking method varies in Outlook since it has a web, desktop, and mobile app. In this section, learn how to unblock spam on all three platforms. 

For Outlook Web

The Outlook Web has two blocking options. One option is blocking directly through your inbox. The second one is adding the email address to your block list. 

Here's how to do both. 

A. Blocking directly in your Inbox

  1. Log in to your Outlook Account. 
  2. Select any message you want to be blocked. 
  3. Click the three dots at the top right toolbar.
  4. Choose the Block option and click Block Sender


B. Adding the Email Address to Your Blocked List

  1. Log in to Outlook. 
  2. Go to settings by clicking the gear icon. 
  3. Tap View All Outlook Settings.


  1. Select Mail, then click Junk Email
  2. Press the +Add button located under Blocked Senders and Domains. 
  3. Enter the email addresses you want to block, and press Enter to save your command. 


For Outlook Desktop

Block emails in Outlook by following these steps:

  1. Open Outlook on your desktop. 
  2. Select the message you want to block in your inbox. 
  3. Click the three dots on the top-right and click Junk
  4. Click Block Sender.

Outlook Spam Email actions

For Outlook Mobile Application

Unfortunately, the Outlook mobile app does not allow the direct blocking of senders. Instead, you can move the items to spam and block them later on your computer. 

Here's how:

  1. Open your Outlook mobile app.
  2. Select the message you want to block. 
  3. Click the File transfer button on the bottom toolbar. 
  4. Select the Junk folder option. 

Getting Rid of Spam Emails on iCloud Mail

Like Gmail, iCloud Mail can detect and block spam before reaching your inbox. However, it doesn't filter all spam emails.

To manually delete spam or block junk mail from iPhone, iPad, and iCloud Mail, follow these steps:

For iPhone and iPad

  1. Log in to your iCloud account.
  2. In your inbox, click Edit in the top toolbar. 

iCloud Mail Inbox

  1. Tap the empty circle on the left side of the message and click Move


  1. Choose Junk and click Move


For iCloud Website Mail

  1. Log in to your iCloud mail.
  2. Select the spam emails. Click the folder icon.
  3. Choose Move to Junk.


The Dangers of Spam Messages

Spam emails often bring malicious intent to their recipient. Know the potential dangers of spam messages through this list: 


1. Spyware

Spyware tracks your online activities like email, usernames, passwords, bank information, etc. It is the easiest way to obtain and use your data for a hacker’s gain.

Spam emails usually contain spyware that is activated when you click a link in the message. 

🎉 Fun Fact

Spyware can cause so much damage that 23,903 people lost $347 million from tech support scams in 2021. You must be cautious when dealing with suspicious emails as they may contain spyware.

Fraudsters pose as legitimate tech support. They send a compromised email offering to resolve issues like software license renewal or bank updates. 

Once you give in to the attacker's request to download or click a link, they will install spyware on your device. 

2. Phishing

Phishing emails are so common that it affects one in every five people online. These emails are from someone who poses as a legitimate organization to ask for your personal information.

Several phishing scammers acted as event organizers during the 2018 World Cup in Russia. They stole email addresses and other information through continuous spam messages.

✅ Pro Tip

It is easy to spot a phishing email. If you are not expecting an email from an individual or a group and the email address is different or suspicious, it may be a phishing message. 

3. Ransomware

Ransomware is malware that encrypts your data and holds it for ransom. Downloading or clicking a link from a ransomware-embedded mail can lock your device. 

Despite most users being unfamiliar with this malware, it is actually one of the most widespread cyber threats in the world. There were almost 500 million ransomware attacks in 2022 alone.

Unlike spyware, you will immediately know when ransomware infects your device. The most common sign is that you can't access your files.

A ransom note will appear on your computer screen or in all your files. The request would mainly involve money in Bitcoins.

🎉Fun Fact 

One of the most notorious ransomware to proliferate emails in 2019 and 2020 is Ryuk. The FBI reported Ryuk's attacks to amount to over $61 million in damage. 

Protect Yourself From Spam Emails

Sometimes, blocking isn't enough to prevent spam from creeping into your mailbox. 

You need to reduce your email addresses' exposure to prevent spam from coming back. Here are some preventive tips to consider:

1. Modify your email privacy settings

Blocking a spam message is an effective prevention from returning junk emails.

Changing your email privacy setting is even better. It lowers your exposure to spam in the first place. 

One way to keep your email private is to not share your email address with organizations you don't know. 

✅ Pro Tip

Set up multi-factor authentication to secure your mailbox. Most platforms offer this type of security to avoid hacking and other cyberattacks.

2. Use complex passwords

It's inconvenient to memorize long and complex passwords, so people tend to set easy ones. Most use the same password for all their accounts. 

If you want to keep your email secure, make sure not to include the following when creating a password:

  • Consecutive numbers or characters
  • Personal information like birth date or house address
  • Easy-to-guess keystroke patterns

These are good ideas for creating a password for your email and other accounts:

  • Create a complex combination of arbitrary alphanumeric and special characters. Make it as unique as you can.
  • Make it long. Short passwords can be easy to guess. 

🔓 Security Note

There's a chance you won't remember most of your passwords. However, never write your passwords on paper.

You can use a secure and efficient tool to handle all your passwords in one place. Try using a trusted password manager like Passwarden.   

3. Use several email addresses

Having several email addresses lessens cybersecurity risks. This way, you can secure your data and avoid the dangers of spam emails by directing them away from any valuable personal information. 

✅ Pro Tip

You should have a primary email involving sensitive data. This data includes banking, shopping, work, and personal contacts. Use a secondary email for subscriptions or mailing lists. 


Nothing is more annoying than constantly clearing junk messages in your electronic mailbox. However, it's terrifying to discover that someone robbed you because of a link you clicked. 

Spam email is an entry point for cybercriminals. Outwit them by blocking or junking emails to secure your digital footprint.


Why am I suddenly getting lots of spam emails?

Your email address is probably part of a list recently sold to spammers. You might have also signed up for a mailing list of products or services. 

Is it better to block or delete spam?

It's better to stop the spam or move them to the junk folder. Blocking or marking the spam as junk prevents it from returning to your mailbox. 

How many emails are considered spam?

If you send emails using a Gmail account, you can get flagged by sending one email to more than 500 recipients

How to permanently stop spam emails on Gmail?

Unfortunately, you can't stop all spam messages from reaching your Gmail account. However, you can reduce your exposure to spammers by using the tips in this guide.



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