how to limit sending an email notification to specific users

[A S]

We use Jira SD (next-gen cloud) to process tickets from monitoring systems and other ticketing systems. The email of these systems are customers at Jira SD. We need to limit the sending of notifications to some of the customer emails (specific customers).

Otherwise, email loops arise, unnecessary comments are created in issues, or many useless tickets in the SJD open.

Please advise how to set it up in JSD.