BOOKASLOT.UK Technology Profile

Sender ID

Sender ID is an anti-spoofing email framework heavily based on SPF.

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jsDelivr

A free CDN where Javascript developers can host their files. Encompasses MaxCDN, and BootstrapCDN.

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reCAPTCHA v2

v2 of the Google reCAPTCHA system.

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Simple Google reCAPTCHA

Protect WordPress against spam comments and brute-force attacks.

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Nginx

Create a mobile version of your WordPress site using the WPtouch.

Anti-bot CAPTCHA widget from Google.

Plugin for using reCAPTCHA in WordPress.

eCAPTCHA v3 returns a score for each request without user friction.

5.3.3