How To Use Blacklists To Combat Spam

using blacklists combating spam email

According to Statista, spam accounted for more than 55% of total email traffic just a couple of years ago, which caused a lot of problems for both email clients and users. To improve the situation, email services use spam filters and blacklists to protect their customers and ensure solid mailing hygiene. 

If you are new to the “blacklist” terms, then we have some basic information for you. It will introduce you to the topic and will help you get an idea of how blacklists work. 

What Is A Blacklist? 

A blacklist is a selection of IP addresses and domains that have been blocked due to suspicion of spamming. The purpose of blacklists and using the spam black list checker is to reduce the percentage of unwanted/dangerous emails sent to users. There are two types of blacklists: 

● Based on the sender's domain; 
● Based on the sender's IP address. 

If the domain or IP address is on the blacklist, mailings will not be delivered at all or will go through additional spam filters. Blacklists use different algorithms to identify spam. For example, if a mailing list collects a lot of complaints about spam, then the percentage of delivery of letters to the inbox drops to zero. 

How Do Blacklists Work? 

Blacklists use spam traps and spam complaint information to identify the IP addresses and domains that are sending unwanted emails. Spam traps are local email addresses that are scattered across various sites and forums to identify the senders of spam. 

Spam traps fall into two categories: 

● Converted email addresses that have been inactive for over a year, which is why email services have turned them into spam traps. 

● The classic pitfalls are specially crafted email addresses. They are posted on popular resources where you can parse the address base for its further sale or send spam through it. 

All blacklists have different ways of detecting spammers. But almost all of them use some combination of spam traps and spam complaint data. 

Blacklist operators have a large network of spam traps. They leave special email addresses on popular sites and forums, track them down, and blacklist any IP addresses or domains that illegally scrape and send traps to them. 

How To Stay On The Safe Side 

Unfortunately, email filtering tools are no longer necessary to simplify the fight against spam today. Anti-spam solutions take different approaches, but the main methods remain the same. The result is the blacklisting of spammers and whitelisting of known senders. The software solutions on the market are designed to run on both end-user desktops and server systems. Some can even run on both the server and the user. 

Using dynamic blacklisting services remains a very effective means of fighting email spam. As practice shows, dynamic blacklists are a handy tool that should take their place in the arsenal of anyone who wants to successfully fight spam.

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