--- title: What are the whitelisted network endpoints and email domains? description: HackerEarth platform makes use of certain 3rd party services to improve the overall experience of the platform. These services help in providing higher availability of HackerEarth services and faster --- [Skip to content](https://help.hackerearth.com/whitelisted/allowed-endpoints#main-content) English Show submenu for translations ![HE logo.png\]](https://help.hackerearth.com/hs-fs/hubfs/HE%20logo.png?height=40&name=HE%20logo.png) Open main navigation Close main navigation - English Show submenu for translations Hello. How can we help you? - There are no suggestions because the search field is empty. 1. [Help Center](https://help.hackerearth.com/?hsLang=en) 2. [Frequently Asked Questions (FAQs)](https://help.hackerearth.com/frequently-asked-questions-faqs?hsLang=en) 3. [Assessments: Recruiters](https://help.hackerearth.com/frequently-asked-questions-faqs?hsLang=en#assessments-recruiters) # What are the whitelisted network endpoints and email domains? ## HackerEarth uses certain third-party services to ensure high availability, security, and optimal platform performance. ### Network domain whitelisting Enterprises use services like DLP, VPN, CASB, and other data protection services to avoid data leaks from individual devices. Some of these block a few endpoints that are critical for the smooth functioning of the HackerEarth platform.  The following table has been created to highlight the various endpoints that should be whitelisted/allowed/exempted. These endpoints are managed services that have already been included as part of HackerEarth’s Data Protection Annexure and are GDPR compliant. | **HackerEarth product** | **Network domains** | **Why** | | --- | --- | --- | | All HackerEarth products \[Assessments, Hiring Challenges, Hackathons, FaceCode\] | \*.hackerearth.com | This is the primary domain. The platform would not work if this is not accessible. | |   | \*.googletagmanager.com | This is required to support analytics. | |   | www.gstatic.com www.google.com | This is required for Recaptcha. | |   | cdn.mxpnl.com api-js.mixpanel.com | This is required for product analytics. | |   | \*.hubspot.com static.hsappstatic.net | This is required to access the support widget - HubSpot. | |   | wss://global.events.live-video.net \*.live-video.net | This is required for Audio proctoring and Video question type features. | |   | Open UDP ports 3478 and 19302 | This is required for audio/video streaming. | |   | Open UDP Port 3478 Open TCP port 443 | Opening these ports will enhance the overall audio/video quality on the platform. | |   | \*.zoom.us, \*.zoom.com, zoom.us, TCP Port 80, 443 UDP Port 3478, 3479, 8801-8810 | This is required for audio/video streaming in FaceCode. | ### **Email sender whitelisting** To ensure reliable delivery of important emails from **HackerEarth** (such as candidate assessment or interview invites, reports, and other notifications), you may need to whitelist our sender address within your email infrastructure. Corporate mail gateways, security systems, and spam filters can sometimes block or filter emails based on internal security or spam policies. Whitelisting prevents these emails from being marked as spam or filtered. | **Email address** | **Why** | **How** | | --- | --- | --- | | support@hackerearth.com | This ensures that emails from HackerEarth Support are not marked as spam or blacklisted. | Whitelisting can be done at the mail gateway, corporate spam filter, or individual mailbox level, depending on your organization’s setup. | #### Optional guidelines - You can add **support@hackerearth.com** to your email allowlist/safe sender list. - If using an enterprise spam filter (Proofpoint, Mimecast, Barracuda, etc.), add support@hackerearth.com to the approved source list. - For inbound delivery reliability, consider also allowing the email *domain* @hackerearth.com. Email whitelisting must be configured within your email infrastructure or spam-filter settings. 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