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website blacklist of email

website blacklist of email

website blacklist of email

There are millions of websites out there and just as many people using them, but there are also spammers. Email blacklist, site registration restrictions and comment spam WordPress Plugins are helpful tools to keep unwanted spammers out of your website. The following WordPress plugins and tools will ensure that these spammers won’t be able to register for your website or invite any unwanted users or viruses.

Spammers can be both humans and bots, who use all types of different methods to access websites. These methods include email confirmation, CAPTCHA protection, security questions and more. These methods increase your website’s security and another step would be adding domains to a blacklist. The following plugins will help users eliminate comment spam, spam registration domains, add whitelisted domains, and secure websites with CAPTCHA.

How do email blacklists work?

To help you understand how a blacklist works, look at this Spamhaus diagram below.

website blacklist of email

For the most part, spam traps fall into one of three categories:

1. Recycled Spam Traps: These are email addresses that were once valid, but have been dormant long enough that they could not have engaged with any email in a long time. Messages sent to these addresses are typically refused (bounced) by the receiving server for a year or more before they are reactivated as spam trap addresses.

2. Typo Traps: These are email addresses that usually end up on recipient lists due to user error. Typing [email protected] instead of [email protected] Similar to recycled spam traps, these addresses never open or click any of the messages they receive. The anti-abuse community believes sending excessive amounts of mail to typo traps is indicative of poor list acquisition practices, and poor list hygiene.

3. Pristine Traps: These are email addresses and domains that have never been used to actively sign up to receive email. Pristine traps most commonly end up on mailing lists when senders purchase, rent, or scrape addresses.

Note: Some email blacklists also list domains and IP addresses based on user-generated feedback and manual reporting of unsolicited emails.

How to find out if you’re on an email blacklist

There are a lot of blacklists, but a good starting point is checking to see if your IPs or domains are on any of these popular lists:

Barracuda Reputation Block List: BRBL is a free DNS blacklist (DNSBL) of IP addresses known to send spam.
Invaluement: The Invaluement anti-spam DNSBL blocks elusive types of spam where the sender is sending unsolicited bulk email and escaping traditional detection methods.
MXToolBox: MXToolbox shows you whether or not your domain or IP address is blacklisted and can perform checks on your DNS to see how it is configured.
MultiRBL: This free multiple DNS blacklist service cross-references other blacklists by IPV4, IPV6, or by domain.
Spamcop: The SpamCop Blocking List (SCBL) lists IP addresses that had mail reported as spam by SpamCop users.
Spamhaus: The Spamhaus Project maintains a number of DNSBLs as part of their effort to identify and track spam sources, and provide anti-spam protection.
SURBL: Unlike most lists, SURBLs are not lists of message senders. SURBLs are lists of websites that have appeared in unsolicited messages.

UltraTools :Use this free Domain Blacklist Check to see if your domain is on a Real Time Email Spam Blacklist, and whom you can contact to dispute the block.

Reducing your risk of getting on an email blacklist

Reputation monitoring is the key to maximum email deliverability. By closely monitoring your complaint rates, you can prevent delivery failures before they happen. Check your stats with each campaign deployment and look for delivery dips and low engagement rates.


By now you should know a lot more about email blacklists and how they work.

Only send your marketing emails to contacts who actually want to hear from you and be sure the content is providing value in some way.

Signing up to a reputable email service provider is one of the best ways to manage emails and optimize your deliverability.


About the author

jon snow

Jon is a Linux and F.O.S.S enthusiast, an upcoming Linux SysAdmin, and currently a content creator for ERRORHAT who loves working with computers and strongly believes in sharing knowledge.

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