![]() ![]() ![]() * *Can visitor copy-n-paste the link from onscreen text without needing to make modifications?* Yes (unless they have CSS disabled). * *Uses CSS?* Yes, which means if a visitor does not have CSS enabled, the emails will appear with extra text in them. Email scrapers don't typically utilize a CSS engine to help determine how text would look onscreen. Using CSS, the text gets hidden so that visitors see the email addresses as intended. * *How does it work?* Garbage text, wrapped in span tags, is inserted into any displayed email addresses. * *How effective is this?* In the aforementioned experiment, no spam emails were received when using just this technique. * *Does this protect emails appearing in mailto: links and within HTML tag attributes?* No. However, a right-click -> "copy link/email address" will work properly for linked e-mail addresses. * *Can visitor copy-n-paste the link from onscreen text without needing to make modifications?* No, text copied in such a manner will be reversed. * *Uses CSS?* Yes, which means if a visitor does not have CSS enabled, the emails will appear backwards to them. ![]() Email scrapers don't recognize the emails in their reversed form and don't typically utilize a CSS engine to help determine how text would look onscreen. Using CSS, the text gets reversed so that visitors see the email addresses as intended. * *How does it work?* The email addresses are sent reversed in the markup. = Changing text direction with CSS (not enabled by default) = (For all the examples below, assume you have the link in your post.) Weigh the requirements against what you're comfortable requiring of visitors in order for them to see and make use of e-mail addresses you post on your site. The fourth of his techniques is also included even though it did get a very small amount of spam - the technique was still very effective and more importantly does not rely on users to have CSS or JavaScript enabled. Two of those three techniques are included in this plugin. Three techniques stood out as having received *zero* spam e-mails during that time. ![]() During that time he measured the amount of spam received to each of the e-mail addresses. He ensured the page containing those e-mail addresses got indexed by Google and then waited 1.5 years. I urge you to read about an ( ) performed by Silvan Mühlemann in which he protected e-mail addresses using nine different techniques. The e-mail obfuscation techniques included in this plugin were chosen for their effectiveness and general applicability with minimal impact on users. Please read the Details section of this documentation to learn more about the techniques employed. See Filters section for `c2c_obfuscate_email_filters` for complete list of filters that are processed. The plugin's settings page allows you select which techniques to use. You can decide on a technique by technique basis which ones you'd like to employ as some have potential drawbacks. While techniques abound for e-mail obfuscation, the three techniques included empirically provide you with the best balance of e-mail address protection with minimal impact on visitors. The plugin allows for use of one or more (or all!) of three proven techniques for email protection. "Obfuscation" simply means that techniques are employed to modify e-mail address strings that appear on your site in such a way that bots scraping your site are unable to identify those addresses however, at the same time those e-mails addresses should still look and work correctly for visitors, as much as possible. Obfuscate e-mail addresses to deter e-mail harvesting spammers, while retaining the appearance and functionality of hyperlinks. Tags: email, obfuscation, security, spam, coffee2code ![]()
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