---
title: Whitelisting for Mimecast
description: Learn how to whitelist emails in Mimecast to prevent important messages from being marked as spam. Follow our simple guide to ensure trusted senders always reach your inbox.
---

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1. [← back to all support articles](https://support.jerichosecurity.com/)

# Whitelisting for Mimecast

**Preventing Link Re-writing**

1. Log into your Mimecast Administration Console
2. Navigate to **Services | URL Protection**.
3. Click the **URL Tools** drop-down.
4. Click **Managed URLs**. A list of managed URLs is displayed.
5. Add Managed URLs
   
   
   
     1. The primary url is **[https://app.redirectingly.com](https://app.redirectingly.com/)**, however, we do add additional URLs. Please contact [support@jerichosecurity.com](mailto:support@jerichosecurity.com) to ask about these additional URLs.

**The next policy-based tasks all start with the following**:

1. Log into your Mimecast Administration Console.
2. Click the **Administration toolbar** button.
3. Select the **Gateway | Policies** menu item.

**Permitted Senders**

1. From **Gateway | Policies**, select **Permitted Senders.**
2. Select the **New Policy** button.
3. Name the policy narrative **Jericho Phishing Simulations** and permit sender
4. Apply the policy to everyone (including all senders and recipients)
5. Enable and set the policy as perpetual
6. Check the **Policy Override** box
7. Input the IP Addresses found in our [general whitelisting guide](https://intercom.help/jericho-security/en/articles/9972199-general-whitelisting)
8. Save the policy

**URL Protection Bypass**

1. From **Gateway | Policies**, select **URL Protection Bypass.**
2. Select the **New Policy** button.
3. Name the policy narrative **Jericho URL Protection Bypass** and disable the protection
4. Apply the policy to everyone based on the Both
5. Enable and set the policy as perpetual
6. Check the **Policy Override** box
7. Input the IP Addresses found in our [general whitelisting guide](https://intercom.help/jericho-security/en/articles/9972199-general-whitelisting)
8. Save the policy

 

**Attachment Protection Bypass**

***Note:*** The attachment bypasses are necessary for using Jericho's Attachment-based attack types.

1. From **Gateway | Policies**, select **Attachment Protection Bypass.**
2. Select the **New Policy** button.
3. Name the policy narrative **Jericho Attachment Protection Bypass** and disable the protection
4. Apply the policy to everyone based on the Return Address
5. Enable and set the policy as perpetual
6. Check the **Policy Override** box
7. Input the IP Addresses found in our [general whitelisting guide](https://intercom.help/jericho-security/en/articles/9972199-general-whitelisting)
8. Save the policy

**Attachment Management Bypass**

1. From **Gateway | Policies**, select **Attachment Management Bypass.**
2. Select the **New Policy** button.
3. Name the policy narrative **Jericho Attachment Management Bypass** and disable the protection
4. Apply the policy to everyone based on Both
5. Enable and set the policy as perpetual
6. Check the **Policy Override** box
7. Input the IP Addresses found in our [general whitelisting guide](https://intercom.help/jericho-security/en/articles/9972199-general-whitelisting)
8. Save the policy

**Impersonation Protection Bypass**

***Note***: This is necessary if you want to create campaigns where you are impersonating someone from your company ex. your company's CEO.

1. From **Gateway | Policies**, select **Impersonation Protection Bypass.**
2. Select the **New Policy** button.
3. Name the policy narrative **Jericho Impersonation Protection Bypass** and select the impersonation protection definition to bypass (if it does not exist, then you should not have to continue with the policy definition).
4. Apply the policy to everyone based on Both
5. Enable and set the policy as perpetual
6. Check the **Policy Override** box
7. Input the IP Addresses found in our [general whitelisting guide](https://intercom.help/jericho-security/en/articles/9972199-general-whitelisting)
8. Save the policy

**Greylisting Bypass**

1. From **Gateway | Policies**, select **Greylisting.**
2. Select the **New Policy** button.
3. Name the policy narrative **Jericho Greylisting Bypass** and select Take no action.
4. Apply the policy to everyone based on the return address
5. Enable and set the policy as perpetual
6. Check the **Policy Override** box
7. Input the IP Addresses found in our [general whitelisting guide](https://intercom.help/jericho-security/en/articles/9972199-general-whitelisting)
8. Save the policy

##### Categories

- [Support (14)](https://support.jerichosecurity.com/tag/support)
- [Whitelisting (6)](https://support.jerichosecurity.com/tag/whitelisting)
- [Azure (2)](https://support.jerichosecurity.com/tag/azure)
- [O365 (2)](https://support.jerichosecurity.com/tag/o365)
- [Okta (2)](https://support.jerichosecurity.com/tag/okta)
- [SSO (2)](https://support.jerichosecurity.com/tag/sso)
- [Barracuda (1)](https://support.jerichosecurity.com/tag/barracuda)
- [Google (1)](https://support.jerichosecurity.com/tag/google)
- [Mimecast (1)](https://support.jerichosecurity.com/tag/mimecast)
- [Phishing (1)](https://support.jerichosecurity.com/tag/phishing)
- [Proofpoint (1)](https://support.jerichosecurity.com/tag/proofpoint)
- [Triage Center (1)](https://support.jerichosecurity.com/tag/triage-center)

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##### Popular Support Articles

Platform <https://support.jerichosecurity.com/mimecast-whitelisting#collapseLanding>

- [Cybersecurity Dashboard](https://www.jerichosecurity.com/platform/cybersecurity-dashboard)
- [Phishing Simulator](https://www.jerichosecurity.com/platform/phishing-simulator)
- [Performance Analytics](https://www.jerichosecurity.com/platform/employee-performance-analytics)
- [Customized Training](https://www.jerichosecurity.com/platform/training-content)

Solutions <https://support.jerichosecurity.com/mimecast-whitelisting#collapseLanding>

- [Anti-Phishing Training](https://www.jerichosecurity.com/solutions/anti-phishing-training)
- [SMB Cybersecurity Training](https://www.jerichosecurity.com/solutions/smb-cybersecurity-training)
- [Enterprise Cybersecurity Training](https://www.jerichosecurity.com/solutions/enterprise-cybersecurity-training)
- [Cybersecurity Awareness Training](https://www.jerichosecurity.com/solutions/cybersecurity-awareness-training)

Industries <https://support.jerichosecurity.com/mimecast-whitelisting#collapseLanding>

- [Retail](https://www.jerichosecurity.com/industries/retail)
- [E-Commerce](https://www.jerichosecurity.com/industries/e-commerce)
- [Technology](https://www.jerichosecurity.com/industries/technology)
- [Financial Services](https://www.jerichosecurity.com/industries/financial-services)
- [Healthcare](https://www.jerichosecurity.com/industries/healthcare)
- [Manufacturing](https://www.jerichosecurity.com/industries/manufacturing)
- [Energy](https://www.jerichosecurity.com/industries/energy)
- [Federal Government](https://www.jerichosecurity.com/industries/federal-government)
- [State & Local Government](https://www.jerichosecurity.com/industries/state-local-government)
- [Higher Education](https://www.jerichosecurity.com/industries/higher-education)

Resources <https://support.jerichosecurity.com/mimecast-whitelisting#collapseLanding>

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Company <https://support.jerichosecurity.com/mimecast-whitelisting#collapseLanding>

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