One of the fast growing challenges for nearly all website owners to fight against is spamming. It is becoming more and more dreadful with more threats to cause blocking the important website data. As a spam control solution, it is very essential to include content-based filtering to the board sites, forums, blogs, etc.

Although many tools have been created that hack the anti-spam programs and breaks them to approach the application they want, however, more powerful programs are still under-construction to fight against spam.

Every technique and program to prevent spamming has its own pros and cons. Here is an analysis of modern spam techniques to fight against spamming. All of these techniques are very useful and highly valuable for the blocking of spammers.

Various programs and devices are used to prevent or block the spam before, during, or after the spam messages are sent to a system. Some of those modern spam techniques are as follows:

Blacklist:

Blacklist is a list of those users who are disapproved to access or respond to a website or program. It is also called Blocklist and it is created to prevent or block the users who are generating spam. The user (either human or a robot) is blocked by IP before they send response to the account. In this technique, only the users who are added on the Blacklist are disabled to approach, whereas rest of the users can freely get access.

Whitelist:

This technique is exactly opposite to the Blacklist technique. In Whitelist, the user approach is controlled before their access to a particular account and application by adding them to Whitelist. Basically, Whitelist comprises of only those users who are allowed to get access to the account and send comment. They are mostly members and are permitted to leave comments and messages as they are added to a list. All other users (either human or a robot) are blocked automatically.

Captcha:

Captcha or verification code image is also one of the modern spam control techniques. If Captcha is included in web design then it can stop the unwanted users (automated software and robots) to approach the account. A human can easily identify an image of randomly selected characters with strikethrough and background noise; however, the robots that generate spam can not identify the image. Therefore, after entering the correct Captcha image and answer to Captcha questions, a human gets access to leave comment or response to a forum, blog, or account. Conversely, robots get denied to this approach. Captcha is very effective and modern trick to avoid spam by including it in web design.

Spam Filter:

This program is mostly web based, server based, or installed locally. It is used for filtering the messages and preventing the downloading of spam messages in your account. These types of filter programs collect all the incoming messages and inspect it according to the predefined set of laws by the owner i.e. either an individual or a company. Those messages are automatically deleted that do not qualify the set of defined rules.

Spam Firewall:

Spam firewall is another technique that is installed to block the spamming in the account. It blocks the unauthorized access to a private network and preventing the spam. Mostly, the terms of authority are defined by holder of the network. The spam firewall can be either in hardware or software form, or it can be the combination of both. This technique also helps in preventing spam effectively.