# Message Sanitization in Mimecast

Mimecast may 'sanitize' erroneous characters that are crucial to the appearance of HTML based email.

Written by Marisa Crowder  
October 23, 2024

Mimecast may 'sanitize' erroneous characters that are crucial to the appearance of HTML based email, resulting in odd characters in the email's body copy. Follow this guide to bypass this policy.

- If your emails contain odd characters in the body copy, including this question mark symbol (below) follow these steps:

- Log in to your Mimecast administration console.

- Select **Administration**, then select **Gateway**, then **Policies.**

- Scroll down and select **Message Sanitization.**

#### **Options**

- Click **New Policy.**

- In the **Policy Narrative** field, type **Nectar IP Permit.** _(Or whatever will help track this policy.)_

- In the **Select Option** field, select **Take No Action.**

#### **Emails From**

- In the **Addresses Based On** field, select **The Return Address.**

- In the **Applies From** field, select **External Addresses.**

#### **Emails To**

- In the **Applies To** field, select **Internal Addresses.**

#### **Validity**

- In the **Enable/Disable** field, select **Enable.**

- In the **Set Policy as Perpetual** field, ensure the policy is set to **Always On.**

- In the **Policy Override** field, check the box.

- _This overrides the default order that policies are applied. If there are multiple applicable policies, this policy is applied first unless more specific policies of the same type are configured with an override._

- In the **Source IP Ranges**, input Nectar's delivery server IP address:

- 159.183.82.50

- Select **Save and Exit**

Now you've configured Mimecast to allow emails sent using Nectar to bypass Message Sanitization!