API & Integrations - New API Endpoints - Apr 2025

Service Update 

Availability	April 23rd, 2025
Product(s)	Email Security Cloud Gateway (CG)
Who's affected	Email Security Cloud Gateway (CG) Administrators

Overview 

Mimecast is pleased to announce the general availability of three API Endpoints that allow you to automate the removal of Managed Senders entries from your account.

What's changing 

The following endpoints will be available:

• Internal addresses bulk delete.
• Recipients bulk delete.
• Senders bulk delete.

These new endpoints are geared towards targeting specific entries, either by the recipient or sender/sending domain or internal addresses. The endpoints can be found under Email Security Cloud Gateway:

The Recipient and Senders bulk delete endpoints are limited to 1000 unique email addresses or domains per API call.

For further information on the endpoints, please see the What’s New page which will contain links to the specifications for the new endpoints.

Additional details regarding managed senders can be found at Domains & Users - End User Managed Sender Lists.