From now on, you can ask our support team to restrict your email sending to approved recipient domains only. It’s ideal if you use Mailtrap for internal communication, ensuring emails are sent only to employees and never to external recipients.

What it means: In case your credentials get stolen, attackers cannot use them to send spam outside the allowlist. This protects your sender reputation and controls unwanted volume and costs.

You can request up to 20 allowlisted recipient domains per account.