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Follow on Google News | How to Restrict Site Registration and Block Email Spam DomainsBy: CM Plugins There are several tools which can be used to restrict spammers such as CAPTCHA protection, email confirmation, security questions, and many other functions that add increased security measures to your site’s registration process. On top of this you can also restrict which domains are allowed to be registered in your site and which ones to blacklist. This is a simple and highly effective prevention method that will block spamming attempts right from square one. Identifying Email Spam Domains using SpamAssassin SpamAssassin is part of the Apache Foundation. It uses a variety of spam-detection techniques, including DNS-based and fuzzy-checksum- Using Spamhaus DB Blacklist The Spamhaus DBL is a realtime domain found in spam messages. The DBL is query-able in realtime by mail systems throughout the Internet, allowing mail server administrators to identify, tag or block incoming email containing domains which Spamhaus deems to be involved in the sending, hosting or origination of Unsolicited Bulk Email (aka “Spam”). Using the DBL can help prevent spammers from registering into your site. However, making use of Spamhaus’s free public DNSBL service is restricted to low-volume non-commercial users only. Introducing the Email Registration Blacklist Plugin The plugin is based on both the above services (SpamAssassin and Spamhaus DB Blacklist) allowing WordPress website administrators to block registration attempts from one of the blacklisted domains appearing in these lists. The plugin also enables users to create their own blacklists and manually add them whenever necessary. Whitelisting Banned Domains To override some domains which exist in the above lists, such as gmail.com, the plugin also comes with a manual whitelisting feature, allowing you to add specific domains so they can still be used for registering to your site. End
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