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A website could get on a blacklist if the website owner decided to send out emails promoting a new product to thousands of people. If one or some of the receivers of the mail marks it as spam, the email service provider might place the website on a blacklist. In a different scenario, if you see that your regular site visitors have dropped off and the traffic to your site has stopped; one of the reasons could be that your website has been blacklisted. Also if someone is offering to sell a domain to you; you must check and see if that domain is blacklisted or not.
Some organizations are running the blacklist service on the internet. Email service providers check if a website is blacklisted with DNSBL or SURBL. Email service providers use these services to try and eliminate spam mail before it reaches the user. Some DNSBL service providers use a variety of criteria to list and delist website addresses. Spam filters used by email service providers use DNSBL services as the first line of defense. SURBL is not the first line of defense in checking spam mail. It contains a directory of websites that have been blacklisted for appearing in the text of spam emails. Both these methods are used by email service providers as their first line of defense against spam mail.
No legitimate website wants to get listed on a search engine’s blacklist. If a website is listed on any search engine’s blacklist, that will spell the end ofthat website’s existence on the internet. Search engines blacklist websites for some reasons. If a website is involved in spamming, it will get blacklisted.
If a website is suspected of being used for hacking other websites, it will be blacklisted. If a website has links to untrusted sites, it will beblacklisted. These are just some of the reasons for websites getting blacklisted. Remember search engines examine each website for its contents and itslinks, and if it finds any suspicious activity or bad links on a website, it will blacklist the site. Once a search engine blacklists a website it simplyvanishes from the internet. Search engines use the IP address to blacklist a site. It means that if your website is using a dynamic IP address and thesearch engine blacklists the IP address; all the sites that were using that IP will no longer appear on the internet,
There are thousands of databases on the internet that maintain lists ‘abusive hosts’. Email service providers and ISPs look at these lists to protect their users from potential malware, viruses, or other nasty stuff.
There are so many blacklist websites lists that it becomes virtually impossible for a website owner to check if his or her website is listed on any of the websites. Therefore you need to use a tool to check if your website is on any blacklist. If it is so, you must take measures to have it removed from the list. You can use Google analytical tools to check Google blacklist list.