Add ability to allowlist recipient domains to prevent potential abuse
Allow users to restrict transactional email sending to a predefined list of recipient domains on a per–API key (or SMTP credentials) basis. It will add extra security layer to protect both sender reputation and mailtrap's infrastructure in case of credentials exposure.

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Comments1
Marta from Support Team
Apr 22
Hi there,
Thank you for the idea.
I’ve now logged your request on our side. Our product team will review it during one of the next planning rounds, and we will let you know if this option becomes available at some point.
We really appreciate you taking the time to help us improve 😊