Problem with the link in the mail

Hi,
I created a form (Gravity Forms) with an additional notification to the user’s email. This email contains a static link to download the file. I see that in the incoming email the link changes to something like

https://my_domain/wp-json/wp-mail-smtp/v1/e/ZGF0YSU1QmVtYWlsX2xvZ19pZCU1RD00NiZkYXRhJTVCZXZlbnRfdHlwZSU1RD1jbGljay1saW5rJmRhdGElNUJvYmplY3RfaWQlNUQ9OTQmZGF0YSU1QnVybCU1RD1odHRwcyUyNTNBJTI1MkYlMjUyRmZvcnVtLnBvbHltZXJicmFuY2guY29tJTI1MkYmaGFzaD1mYTQ4ZTdlZDRkMzQyOTkwOWQ1MTliMGI0NzM3NzQzYzdkODBkYzY5MGE2YWVlNmY1MTMzNTM0MmVhMzI5YmFl

This link gives an error:

{"code": "rest_authentication_error", "message": "\u0423 \u0432\u0430\u0441 \u043d\u0435\u0442 \u0440\u0430\u0437\u0440\u0435\u0448\u0435\u043d\u0438\u044f \u043d\u0430 \u0437\u0430\u043f\u0440\u043e\u0441\u044b\u043a REST API. ","data":{"status":401}}

How to solve this problem? (The best way would be just to turn off the cloaking of the link.)