--- title: Why 'safelist'? What should I 'safelist'? description: Why you need to whitelist (safelist), including a list of IP Addresses --- [Skip to content](https://support.hooksecurity.co/why-whitelist-what-to-whitelist#main-content) English Show submenu for translations [Submit a Ticket](https://support.hooksecurity.co/kb-tickets/new?hsLang=en) [Customer Portal](https://support.hooksecurity.co/tickets-view?hsLang=en) [![Hook\_Logo (3)](https://support.hooksecurity.co/hs-fs/hubfs/Hook_Logo%20(3).png?width=150&height=113&name=Hook_Logo%20(3).png)](https://www.hooksecurity.co/welcome) - [Tickets](https://6535385.hs-sites.com/tickets-view) - [Sign out](https://6535385.hs-sites.com/_hcms/mem/logout) Open main navigation Close main navigation - [Tickets](https://6535385.hs-sites.com/tickets-view) - [Sign out](https://6535385.hs-sites.com/_hcms/mem/logout) - English Show submenu for translations - [Submit a Ticket](https://support.hooksecurity.co/kb-tickets/new) - [Customer Portal](https://support.hooksecurity.co/tickets-view) - [Account created in 2026 or later? Go to the Knowledge Base →](https://docs.hooksecurity.co/docs) [Account created in 2026 or later? Go to the Knowledge Base →](https://docs.hooksecurity.co/docs) Hello. How can we help you? - There are no suggestions because the search field is empty. 1. [Help Center](https://support.hooksecurity.co/?hsLang=en) 2. [Getting Started](https://support.hooksecurity.co/getting-started?hsLang=en) 3. [General Safelisting](https://support.hooksecurity.co/getting-started?hsLang=en#general-safelisting) # Why 'safelist'? What should I 'safelist'? ## Why you need to whitelist (safelist), including a list of IP Addresses **Why Whitelist?** Whitelisting allows our simulated phishing emails to bypass your mail filter. In order for simulations to function properly, our IPs must be whitelisted in your spam filter. Some systems may require whitelisting by headers to ensure our test emails are received by your users. #### **IP Addresses** Hook Security's primary IP address is **54.80.160.189** Before running any tests, you need to whitelist the following IP addresses on your servers to ensure delivery: - 64.191.166.196 - 64.191.166.197 - 69.72.47.194 - 54.80.160.189 - 64.191.166.198/201 - 54.88.246.212 - 54.240.70.101 - 54.240.70.102 #### **Email Header** If your security configuration does not allow whitelisting by IP, you also have the option of using our custom email header, which will be inserted into every email your organization receives from us. The header has the name **'X-PHISHTEST'** and the value **'HookMail'**. #### **Whitelisting Domains** In some scenarios, depending on email client/firewall configuration, you may have to whitelist phishing and landing domains. The domains that need to be whitelisted are specified by the templates that you are using.  #### **Whitelisting Best Practices** Make sure the simulated phishing emails are not being sent to the spam folder or being filtered automatically by some external spam filtering system. If it is, and whitelisting doesn't work, the content of the email might have to change to lower the spam rating. 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