For marketers dealing with large email lists, there is no way to block risky emails unless there is a qualified email verification tool.
The real-time verification API blocks risky emails and invalid contacts from entering lists, protecting registration forms, applications, websites and other lead generation services.
Mass verification also has the function of blocking risky and harmful emails, and it does this by analyzing millions of contacts simultaneously.
This process of sanitizing databases – whether through the verification API or bulk email validation – is what guarantees high message deliverability rates.
A list free of bounces and risky emails is a great sales facilitator, as it offers a much larger number of valid leads than a list that hasn’t gone through email verification. Consequently, the cost per lead is reduced.
For all these reasons, it’s important for professionals to be vigilant about frequently sanitizing their contact bases.
The email verification tool is essential for marketers, who need its support to consolidate contact bases with a good capacity to generate leads.
For users, the explanation of how to block risky emails involves other things. We’ll go into more detail in the next few paragraphs.

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How to block risky email: tips for users
For the user, a risky email means spam, which in turn can be the repository of scams or viruses. It is important to remember that serious email marketing senders do not engage in the practice of spreading spam.
This is because the sender is susceptible to penalties under the General Data Protection Act. And email marketers, who depend on email as a communication channel, are not interested in having their campaigns collapse because of problems with the law.
But if the recipient receives spam, how do you block unwanted email once and for all? Although this is the function of spam filters, it is common for some messages to get through the protection barrier and reach the inbox.
This is because the filters have points of vulnerability, and this is where spammers operate. In other words, relying solely on your ISP to prevent risky emails is not enough.
But before you know how to block risky emails for good, you need to know which types of spam can reach your inbox.
See below.
Most common types of spam
Unauthorized emails that arrive in the main mailbox belong to one of the categories below:
- Messages promoting products/services: this is the most common type in inboxes around the world. The aim is to turn the recipient into a lead, but sending email without authorization is spamming.
- Financial scams: these are fake emails that contain links to phishing scams, among others, with the aim of stealing card and bank passwords to carry out financial transactions.
- Chains: texts of a religious and/or spiritual nature that encourage the user to forward the message and thus spread viruses and malware.
- Fake news: emails with defamatory content aimed at damaging the reputation of someone or a company.
- Fake protection: messages with a layout identical to some famous antivirus program, informing you that your device is infected. A request to download the program and clean it is included in the text.
It’s important to note that, contrary to what many people think, a free provider like Gmail, for example, is never really free.
Any email not authorized by the recipient takes up bandwidth, and this generates costs for the providers.
For this reason, the process of tracking spam is strict and sending it to spam boxes is the least expensive way of eliminating messages that take up space that doesn’t belong to them.
However, as we saw earlier, every security scheme has weaknesses, which is why some spam still manages to reach your inbox.
Now that you know how to recognize the most common types of spam, it’s time to find out how to block risky email in your ISP’s settings. That’s what we’ll look at next.
How to block risky emails in Gmail
- Locate the unwanted message.
- Click on the small box to the left of the message (you don’t have to open it).
- Go to the 3 dots at the top (hover your mouse without clicking. The word “more” will appear).
- Click on the 3 dots and select “filter messages like this”.
- Click on the “Create filter” button.
- Then select the “Delete” option.
- Click on the “Create filter” button again at the bottom right.
That’s it! Gmail users now know how to block spam mail.
In Apple Mail
- Open the application and select the message to block.
- Go to the email header and find the arrow next to the sender’s name.
- Select “Block contact”.
See how easy it is to block spam email in Apple Mail? It’s even easier in Outlook and Yahoo. See below!
How to block risky emails in Outlook
- Locate the message and right-click on it.
- Click on the scroll bar and find “Security options”.
- Select “Block sender”.
On Yahoo
- Find the message you want to block and click on the small box on the left (you don’t have to open the email).
- Click on the 3 dots at the top of the screen and select “Block sender”.

Conclusion
Knowing how to block risky emails is important both for marketers and ordinary users.
However, each audience has a different way of taking action, but with common objectives.
Those who block harmful emails are safer online, are less bothered and have more freedom to send and receive the emails that really matter.
FAQ
Why do marketers and ordinary users block risky emails in different ways?
Professionals deal with large contact lists. That’s why they need the support of an email verification tool, which in turn will block harmful emails from entering their forms and remove invalid addresses from their databases, sanitizing them.
The average user, on the other hand, blocks risky emails manually through their ISP’s settings, which will prevent spam contacts from entering. Each provider has a different configuration.